Geography
United States
9 results
China
7 results
Soviet Union
7 results
Cuba
3 results
North America
3 results
Africa
2 results
Albania
2 results
Asia
2 results
Bulgaria
2 results
Caribbean Area
2 results
Central America
2 results
Communist countries
2 results
Europe
2 results
Korea (North)
2 results
Middle East
2 results
Oceania
2 results
Poland
2 results
South America
2 results
Southeast Asia
2 results
Yugoslavia
2 results
Antarctica
1 results
Arctic regions
1 results
Hungary
1 results
Iran
1 results
Iraq
1 results
USSR
1 results