SUBJECT
Description and travel
38
History
15
Geography
8
Civilization
5
Juvenile literature
4
Scientific expeditions
4
Archaeology
3
Atlases
3
Documentary photography
3
Human ecology
3
Inventions
3
Plate tectonics
3
Antiquities
2
Campaigns
2
Curiosities and wonders
2
Environmental degradation
2
Environmentalism
2
Ethnology
2
Excavations (Archaeology)
2
Human biology
2
Human geography
2
Ice mummies
2
Inca Ice Maiden (Ice mummy)
2
Incas
2
Medicinal plants
2
Pictorial works
2
Rites and ceremonies
2
Science
2
Travel
2
Travel photography
2
Addresses. essays, etc
1
Adventure and adventurers
1
Aerial operations, American
1
African Americans
1
Alternative medicine
1
Ampato, Mount (Arequipa)
1
Ampato, Mount (Arequipa, Peru)
1
Anthropo-geography
1
Architecture
1
Archival materials
1
Beliza (Central America)
1
Biography
1
Chimpanzees -- Behavior
1
China
1
Citizen participation
1
Civil rights
1
Civil rights movements
1
Climatology
1
Conservation and restoration
1
Conservation of natural resources
1
more ...