United States 1,535
Japan 146
Soviet Union 145
Europe, Eastern 82
Eastern Europe 63
Hungary 59
China 44
Developing countries 42
Europe 42
Great Britain 38
Germany 24
Asia 20
Poland 20
France 19
Latin America 19
États-Unis 17
Middle East 15
Israel 13
India 12
Romania 12
Germany (West) 11
Vietnam 11
Communist countries 10
Cuba 10
Africa 9
East Asia 9
Europe, Central 9
Southern States 9
Southeast Asia 8
USA 8
Central Europe 7
Italy 7
Canada 6
Germany (East) 6
Korea (South) 6
Massachusetts 6
Central America 5
Czechoslovakia 5
Europe, Western 5
Pacific Area 5
Washington (D.C.) 5
Yugoslavia 5
Austria 4
Brazil 4
Iran 4
Korea 4
New York (State) 4
South Africa 4
Taiwan 4
Texas 4
Arab countries 3
Argentina 3
Bulgaria 3
California 3
Caribbean Area 3
Egypt 3
Greece 3
Hongrie 3
Korea (North) 3
Libya 3
Mexico 3
New Zealand 3
Pakistan 3
Tibet Autonomous Region (China) 3
Western Europe 3
Alabama 2
Alaska 2
Amchitka Island 2
Amchitka Island (Alaska) 2
Arizona 2
Australia 2
Balkan Peninsula 2
Berkeley (Calif.) 2
Berlin (Germany) 2
Bolivia 2
Burma 2
Cambodia 2
Chicago (Ill.) 2
Chile 2
Cluj-Napoca 2
Cluj-Napoca (Romania) 2
Estados Unidos 2
Etats-Unis d'Amérique 2
Florida 2
Illinois 2
Kentucky 2
Los Angeles 2
Los Angeles (Calif.) 2
Maine 2
Michigan 2
Middle West 2
Netherlands 2
New England 2
New Southwest 2
New Zealand Region 2
Nicaragua 2
North Atlantic Region 2
Okinawa Island (Japan) 2
Palestine 2
Persian Gulf Region 2