Region
United States
19
Illinois
6
Latin America
5
Alabama
4
Chicago Region (Ill.)
4
Chicago
3
Chicago Region
3
Germany
3
Mississippi
3
France
2
Great Britain
2
Romania
2
California
1
Chicago (Ill.)
1
Cuba
1
Czech Republic
1
Czechoslovakia
1
England
1
Georgia
1
Hiroshima-shi
1
Ireland
1
Japan
1
Los Alamos
1
Mexico
1
Netherlands
1
New Mexico
1
Poland
1
Sacramento
1
Soviet Union
1
Spain
1
Ukraine
1
United states
1