History 243 Treatment 182 Social life and customs 108 World War, 1939-1945 97 African Americans 84 Exercise 84 Physical education and training 81 more ... Social conditions 80 Physical fitness 73 Psychotherapy 66 Politics and government 65 Civil rights 60 Vietnam War, 1961-1975 50 Race relations 49 Motion picture producers and directors 45 Prevention 45 Exercise therapy 43 Civil rights movements 40 Civil rights workers 39 Political activity 39 Economic conditions 38 Children 37 Rites and ceremonies 37 Documentary films 36 Physiological aspects 36 Diagnosis 35 Education 35 Athletes 34 Study and teaching 34 Hatha yoga 33 less ...