Geographic Subject
India
18
Pakistan
14
Iowa
8
Indonesia
6
Japan
3
Ohio
3
Arkansas
2
Bangladesh
2
Minnesota
2
New York (State)
2
New Zealand
2
Nāgāland
2
Pennsylvania
2
South Dakota
2
Taiwan
2
Argentina
1
Assam
1
Australia
1
Bihar
1
Brazil
1
Dakota du Nord
1
Developing countries
1
Germany (West)
1
Giessen (Hesse)
1
Hungary
1
Makaleo
1
Mexico
1
Netherlands
1
Niger
1
North Dakota
1
Norway
1
Punjab
1
Sindh
1
Texas
1
Tropics
1