Geographic Subject
Asia
Africa
25
Soviet Union
10
Developing countries
9
Africa, North
5
Europe, Eastern
5
Pacific Area
5
India
3
Middle East
3
Russia (Federation)
3
Arab countries
2
Asia, Southeastern
2
Asie
2
China
2
East Asia
2
Europe
2
Malaysia
2
Sri Lanka
2
United States
2
Australasia
1
Australia
1
Bangladesh
1
Colombia
1
Earth
1
Indonesia
1
Iran
1
Islamic countries
1
Korea (North)
1
Latin America
1
Macedonia
1
Mongolia
1
North America
1
North Pacific Ocean
1
Orient
1
Pacific Coast (Asia)
1
Pakistan
1
Russia
1
Russia, Northern
1
Russian Far East
1
Siberia, Eastern
1
South Asia
1
Vietnam
1