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- Power resources--Environmental aspects1
- Children and youth83
- Youth27
- Youth--Political activity17
- Elections13
- Children11
- Child welfare9
- Children's rights9
- Presidents8
- Health education7
- Child labor6
- Children--Government policy6
- Child nutrition5
- Education5
- Youth and violence5
- Child care4
- Children--Health and hygiene4
- Political campaigns4
- Youth--Health and hygiene4
- Blacks3
- Child sexual abuse3
- Children--Legal status, laws, etc.3
- Family3
- LGBTQ+ people3
- Political parties3
- Public safety3
- Rural conditions3
- Violence3
- Youth--Drug use3
- Agriculture2
- Catholic Church2
- Children--Crimes against2
- Culture2
- Discrimination2
- Education, Primary2
- Environmental education2
- Feminism2
- History2
- Policy analysis2
- Protest movements2
- Public health2
- Social justice2
- Social movements2
- Social policy2
- Social problems2
- Teenagers2
- Voting2
- Women household employees2
- Adoption1
- Agricultural workers1
- Art--Study and teaching1
- Arts1
- Biography1
- Community development1
- Community organization1
- Contraception1
- Courts1
- Crime prevention1
- Diseases1
- Drug policy1
- Early childhood education1
- Education and state1
- Education, Rural1
- Education--Political aspects1
- Educational law and legislation1
- Energy1
- Family violence1
- Festivals1
- Gay rights1
- Gender1
- Government policy1
- Health services accessibility1
- Homosexuality--Government policy1
- Human rights1
- Judicial system1
- Labor1
- Labor unions1
- Land reform1
- Laws1
- Men1
- Performing arts1
- Prisons1
- Racism1
- Rain forests1
- Religious education1
- Reproductive health1
- Reproductive rights1
- Research institutes1
- Schools1
- Sex instruction1
- Sexual abuse victims1
- Slavery1
- Social conditions1
- Social policy--Citizen participation1
- Sports1
- Substance abuse1
- Sustainable agriculture1
- Urban transportation1
- Women's health1
- Women's rights1
- Women--Crimes against1
- Women--Health and hygiene1
- Religion57
- Afro-Brazilian cults15
- Religion and politics15
- Catholic Church14
- Elections13
- Blacks9
- Political campaigns9
- Indigenous peoples7
- Protestant churches6
- Human rights5
- Presidents5
- Christians4
- Culture4
- Evangelicalism4
- Ethnic groups3
- Missionaries3
- Religion3
- Rites and ceremonies3
- AIDS (Disease)2
- Environmental protection2
- Festivals2
- History2
- Poverty2
- Armed Forces1
- Art--Study and teaching1
- Arts1
- Biography1
- Child welfare1
- Cities1
- Conservation of natural resources1
- Conversion1
- Democracy1
- Discrimination1
- Economic and social development1
- Ethnic art1
- Families1
- Freedom of expression1
- Government policy1
- HIV infections1
- Health1
- Indigenous peoples--Civil rights1
- Judaism1
- Labor unions1
- Labor unions--Political activity1
- Literature1
- Mass media--Political aspects1
- Medical care1
- Museum exhibits1
- Music1
- National parks and reserves1
- Popular culture1
- Protest movements1
- Public health1
- Religious art1
- Religious education1
- Slavery1
- Social conditions1
- Social justice1
- Social movements1
- Spiritualism1
- Sports1
- Teaching--Aids and devices1
- Teenagers1
- Violence1
- War1
- Waste disposal1
- Women1
- Youth and violence1
- History46
- History34
- Blacks12
- Local history9
- Culture4
- Labor unions--Political activity4
- Caricatures and cartoons3
- Collective memory3
- Discrimination3
- Human rights3
- Protest movements3
- Racism3
- Slavery3
- Working class3
- Arts2
- Biography2
- Catholic Church2
- Community development2
- Community organization2
- Emblems, National2
- Guidebooks2
- Labor unions2
- Minorities--Education2
- Science and technology2
- Social movements2
- Tourist maps2
- AIDS (Disease)1
- Afro-Brazilian cults1
- Architecture1
- Archives1
- Banks and banking1
- Child welfare1
- Cities1
- Civil rights1
- Ecology1
- Education and state1
- Education--Political aspects1
- Elections1
- Environment1
- Environmentalism1
- Feminism1
- Festivals1
- Folk art1
- Geology1
- Government policy1
- HIV infections1
- Holidays1
- Indigenous art1
- Indigenous peoples1
- Industries1
- Labor1
- Labor laws and legislation1
- Land reform1
- Laws1
- Literature1
- Minorities--Legal status, laws, etc.1
- Minorities--Political activity1
- Monuments1
- Museum exhibits1
- Museums1
- National parks and reserves1
- Performing arts1
- Philately1
- Political campaigns1
- Political parties1
- Politics1
- Popular culture1
- Presidents1
- State-sponsored terrorism1
- Strikes and lockouts1
- Sustainable development1
- Truth commissions1
- Universities and colleges1
- Women--Political activity1
- World War, 1939-19451
- Youth1
- Youth--Political activity1
- Urban issues44
- Urban transportation16
- Cities13
- City planning4
- Political campaigns4
- Public safety4
- Public works4
- Transportation4
- Elections3
- Housing3
- Housing policy3
- Urban violence3
- Education2
- Green technology2
- Human rights2
- Public health2
- Sustainable development2
- Urban population2
- Afro-Brazilian cults1
- Blacks1
- Books and reading1
- Building1
- Business1
- Child welfare1
- Community development1
- Community organization1
- Crime1
- Crime prevention1
- Culture1
- Economic and social development1
- Economic assistance1
- Economic policy1
- Emblems, National1
- Employee rights1
- Environmental policy1
- Festivals1
- Forests and forestry1
- Government policy1
- History1
- Human rights--Law and legislation1
- Indigenous peoples1
- Indigenous peoples--Civil rights1
- Information technology1
- Labor unions--Political activity1
- Land reform1
- Land use, urban1
- Local government1
- Local government --Economic aspects1
- Local history1
- Mass media1
- Motion pictures1
- Music1
- People with disabilities--Civil rights1
- Political parties1
- Politics1
- Poverty1
- Public administration1
- Public safety--Social aspects1
- Recreation1
- Recycling (Waste, etc.); Waste disposal1
- Sanitation1
- Science and technology1
- Small business1
- Social justice1
- Social problems1
- Squatter settlements1
- Tourist maps1
- Urban policy--Environmental aspects1
- Urban renewal1
- Urban-rural migration1
- Violence1
- Waste disposal1
- Water--Health aspects1
- Working class1
- Science and Technology35
- Science and technology17
- Information technology13
- Animal rights3
- Environment3
- Medical technology3
- Public safety3
- Science education3
- Biotechnology2
- Education2
- Energy Technology2
- Local government2
- Mass media--Political aspects2
- Political campaigns2
- Artists1
- Arts1
- Astronautics1
- Banks and banking1
- Biodiversity1
- Blacks1
- Business1
- Child welfare1
- Cities1
- Community development--Environmental aspects1
- Diseases1
- Ecology1
- Elections1
- Employee rights1
- Energy1
- Environmental education1
- Environmental policy1
- Environmental protection1
- Ethnic groups1
- Fish trade--Environmental aspects1
- Forced migration1
- Forests and forestry1
- Geology1
- Government policy1
- Health1
- Health policy1
- Health services accessibility1
- History1
- Industrialization1
- Labor1
- Labor unions--Political activity1
- Mental health1
- Museum exhibits1
- Nature conservation1
- Oil industries1
- Performing arts1
- Philately1
- Politics and government1
- Pollution1
- Power resources--Environmental aspects1
- Protest movements1
- Public health1
- Social conditions1
- Urban policy--Environmental aspects1
- Water resources1
- Working class1
- Tourism14
- Tourism5
- Guidebooks3
- Local history3
- Tourist maps3
- Advertising--Tourism2
- Indigenous peoples2
- National parks and reserves2
- Cities1
- Civil society1
- Community development1
- Community development--Environmental aspects1
- Conservation of natural resources1
- Culture1
- Democracy1
- Education and state1
- Environment1
- Ethnic art1
- History1
- Labor laws and legislation1
- Monuments1
- Nature conservation1
- Politics and government1
- Tourism and gastronomy1
- Tourism--Economic aspects1
- Work environment1
- Working class1
- Sociology7