Region
United States
15
United States --
12
California --
4
Argentina
3
China --
3
Japan --
3
Argentina --
2
Asia
2
Asia --
2
California
2
China
2
Europe --
2
Japan
2
Moscow
2
Russia --
2
Soviet Union --
2
Bangladesh --
1
Cuba --
1
Developing countries --
1
East Asia
1
Educational evaluation --
1
El-Salvador --
1
El-Salvador-Honduras conflict, 1969
1
Foreign countries
1
Great Britain
1
Honduras --
1
Hungary
1
Hungary --
1
India-Pakistan Conflict, 1971
1
Korea (South)
1
Korea (South) --
1
Liberia --
1
Los Angeles
1
Mexico
1
Mexico --
1
Minnesota
1
Moscow (Russia) --
1
Oceania --
1
Pacific Area
1
Pacific Area --
1
Pacific Island --
1
Pacific area
1
Pacific area --
1
Puerto Rico
1
Rio Grande do Sul (Brazil) --
1
Russia (Federation)
1
Russia (Federation) --
1
South Africa --
1
South Asia --
1
Soviet Union
1
more ...