• 13 Videos, Slides, Films

• 13 Population
• 13 Social ecology
• 13 Social evolution
• 13 Social structure
• 13 Tribes
• 6 Civilization, Ancient
• 6 Technology and civilization
• 3 Hatsa (African people)
• 3 History
• 3 Hunting and gathering societies
• 1 Cities and towns
• 1 Computers
• 1 Dams
• 1 Depressions
• 1 Dogon (African people)
• 1 Epidemiology
• 1 Forced migration
• 1 HIV-positive children
• 1 Human rights
• 1 Indigenous peoples
• 1 Religion
• 1 Rites and ceremonies
• 1 Robotics

• 13 Films Media Group
• 13 Films for the Humanities & Sciences (Firm)
• 6 Parthenon Entertainment (Firm)
• 3 Sideways Film
• 2 Planet Pictures (Firm)
• 1 Albatross World Sales
• 1 International Center for G

• 13 English

• 4 Africa, Sub-Saharan
• 2 China
• 1 San Xia Dam (China)
• 1 United States

• 13 Educational films
• 13 Internet videos

Limit year range