Subject Region
United States
67
Great Britain
23
Soviet Union
20
Germany
10
Communist countries
9
France
7
China
6
Israel
6
Germany (East)
4
Middle East
4
Australia
3
Berlin
3
England
3
Europe
3
Europe, Eastern
3
Berlin (Germany)
2
Canada
2
Egypt
2
Germany (West)
2
Hong Kong
2
Macau
2
New York
2
New York (State)
2
Russia
2
Russia (Federation)
2
Switzerland
2
Afghanistan
1
Albuquerque
1
Albuquerque (N.M.)
1
Austria
1
Badakhshān
1
Badakhshān (Afghanistan)
1
Bletchley Park (Milton Keynes, England)
1
Cairo
1
Cairo (Egypt)
1
Confederate States of America
1
Czechoslovakia
1
Espana
1
Europe, Western
1
Gloucester (England)
1
Greece
1
India
1
Iraq
1
Ireland
1
Italy
1
Latin America
1
Lisbon
1
Lisbon (Portugal)
1
London
1
Mexican-American Border Region
1
more ...