Region
Africa, Southern
3
Africa, Sub-Saharan
1
Berlin (Germany)
1
California
1
China
3
Communist countries
6
Cuba
3
Czechoslovakia
1
Developing countries
1
Europe
2
Europe, Eastern
1
Europe, Western
2
Germany
1
Italy
1
Latin America
1
Portland (Or)
1
Russia
4
San Francisco
1
Soviet Union
30
Turkey
1
United States
9
Vietnam
1
Vietnam (Democratic Republic)
2