Subject Region
United States
23
Germany
9
Europe
8
North America
8
England
4
Norway
4
Amazon River Region
2
America
2
Atlantic Ocean Region
2
China
2
Confederate States of America
2
East Asia
2
Great Britain
2
Japan
2
Middle West
2
Netherlands
2
Alberta
1
Allegheny River Valley (Pa. and N.Y.)
1
Assyria
1
British Columbia
1
California
1
Cambridge
1
Canada
1
Connecticut
1
Espana
1
France
1
Greece
1
Italy
1
Jingmen Shi
1
Klamath Basin National Wildlife Refuges
1
Spain
1
Tennessee
1