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