Region
United States
173
Hungary
16
Japan
15
Poland
11
Soviet Union
10
Europe
7
États-Unis
7
États-Unis
7
Germany
6
Romania
6
India
5
New York (State)
5
USA
5
Washington (D.C.)
5
California
4
France
4
Europe, Eastern
3
Germany (West)
3
Hongrie
3
New York
3
West Virginia
3
Alaska
2
Arab countries
2
Asia
2
Bulgaria
2
Canada
2
Eastern Europe
2
Foreign countries
2
Great Britain
2
Illinois
2
Kentucky
2
Los Alamos
2
Massachusetts
2
Middle East
2
Middle West
2
Nevada
2
New Mexico
2
North Carolina
2
Roumanie
2
San Francisco
2
Southern States
2
URSS
2
Vietnam
2
Africa
1
Allemagne
1
Allemagne (Ouest)
1
Allemagne RF
1
Austria
1
Berkeley
1
Berkeley (Calif.)
1
more ...