videocassettes History 60 Documentary films 45 Video recordings for the hearing impaired 38 Biography 29 Politics and government 28 Social conditions 26 više ... Drama 25 Civilization 21 Economic conditions 21 African Americans 20 Education 20 Study and teaching 18 Social life and customs 17 Feature films 16 Interviews 16 Social aspects 14 Women 13 Documentary television programs 12 Race relations 12 Teaching 12 Nuclear warfare 11 Presidents 11 Brain 9 English literature 9 Psychological aspects 9 Case studies 8 Child development 8 Executive power 8 Learning 8 manje ...