Geographic Subject
India
5
Russia (Federation)
5
Philippines
4
Argentina
3
Soviet Union
3
United States
3
Panama Canal (Panama)
2
Sweden
2
Africa, Southern
1
Alabama
1
Arkansas
1
China
1
Colorado
1
Finland
1
Germany
1
Guatemala
1
Hungary
1
India, South
1
Indiana
1
Indonesia
1
Karelia
1
Latin America
1
New Hampshire
1
Pakistan
1
Panama Canal Zone
1
Pennsylvania
1
Russian Federation (Asia)
1
Saint Petersburg
1
Siberia
1
South America
1
Southeast Asia
1
USSR
1
Venezuela
1
Virginia
1
Volga River Region
1
Wisconsin
1