Region
Afghanistan
3
Africa
6
Asia
43
Asia, Central
29
Asia, Southeastern
4
China
3
Communist countries
1
Developing countries
1
East Asia
11
Europe
1
Great Britain
4
Greece
1
India
3
Iran
1
Japan
3
Middle East
9
Orient
1
Pacific Area
3
Persian Gulf Region
1
Rome
1
Russia
4
Russia (Federation)
7
Siberia, Eastern
1
South Asia
6
Southeast Asia
1
Soviet Union
Tajikistan
1
United States
3
Volga River Region
1