Geographic Subject
Indonesia
22
Texas
20
India
17
Soviet Union
9
Asia, Southeastern
8
Michigan
7
Russia (Federation)
5
Malaysia
4
Tropics
4
Wisconsin
4
Bangladesh
3
Canada
3
Pakistan
3
Africa
2
Asia
2
Guinea-Bissau
2
Iowa
2
Moldova
2
Sri Lanka
2
United States
2
Uzbekistan
2
Africa, East
1
Armenia (Republic)
1
Bur︠i︡ati︠i︡a
1
Caucasus
1
Colombia
1
Developing countries
1
Former Soviet republics
1
France
1
Germany
1
Great Britain
1
Indochina
1
Java
1
Kiev (Guberniya)
1
Kiev (Ukraine : Guberniya)
1
Komi
1
Latin America
1
Maharashtra
1
Manitoba
1
Meghalaya
1
Minnesota
1
North Dakota
1
Poland
1
Punjab (State)
1
Riau
1
Siberia, Western
1
South Asia
1
South Dakota
1
Southern States
1
Sumatra
1
more ...