Geographic Subject
Albania
1
American Samoa
1
Angola
1
Argentina
1
Australia
1
Austria
1
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1
Belgium
1
Bolivia
1
Brazil
1
Bulgaria
1
Burma
1
Cameroon
1
Canada
1
Chile
1
China
1
Colombia
1
Congo (Democratic Republic)
1
Costa Rica
1
Cuba
1
Cyprus
1
Czechoslovakia
1
Denmark
1
Dominican Republic
1
Ecuador
1
Egypt
1
El Salvador
1
Estonia
1
Ethiopia
1
Falkland Islands
1
Fiji
1
Finland
1
France
1
Germany (East)
1
Germany (West)
1
Ghana
1
Great Britain
1
Greece
1
Guatemala
1
Haiti
1
Honduras
1
Hungary
1
Iceland
1
India
1
Indonesia
1
Iran
1
Iraq
1
Ireland
1
Israel
1
Italy
1
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