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History 118 Social conditions 51 Social life and customs 43 Social aspects 40 Psychological aspects 25 Documentary films 24 Politics and government 24 Treatment 24 African Americans 22 Environmental aspects 22 Race relations 22 Women 20 Prevention 19 Exercise 18 Nursing 18 Physical education and training 18 Patients 17 Political aspects 17 Psychology 17 Study and teaching 16 Economic conditions 15 Indians of North America 14 History and criticism 13 Law and legislation 13 AIDS (Disease) 11 Civil rights 11 Counseling 11 Economic aspects 11 Family relationships 11 Lesbians 11