History 48 Politics and government 13 Documentary films 9 African Americans 8 Art 7 Social life and customs 7 Films for hard of hearing people 6 Asian Americans 5 Depressions 5 Kings and rulers 5 Discoveries in geography 4 Documentary television programs 4 Emigration and immigration 4 History and criticism 4 Music 4 Musical form 4 Social conditions 4 Style, Musical 4 Asians 3 Civilization 3 DVD-Video discs 3 Discovery and exploration 3 Histoire 3 Human evolution 3 Immigrants 3 Jazz 3 Jews 3 Public television 3 Race relations 3 Art, American 2