Region
United States
48
China
6
West (U.S.)
5
Great Britain
4
New England
4
Pennsylvania
4
Soviet Union
4
California
2
Canada
2
Illinois
2
Indiana
2
New York (State)
2
Railroad
2
Russia
2
Africa
1
Africa, Sub-Saharan
1
Boston
1
Central America
1
Chicago Region
1
Cuba
1
Djibouti
1
Ethiopia
1
Europe
1
Germany
1
Great Plains
1
Iowa
1
Japan
1
Kansas City
1
Louisiana
1
Massachusetts
1
Mexico
1
Middle West
1
Minneapolis
1
Minneapolis (Minn.)
1
Minnesota
1
Missouri
1
New Orleans
1
New Orleans (La.)
1
Northeastern States
1
Prussia
1
Russia (Federation)
1
South America
1
Sub-Saharan Africa
1
Uganda
1
Virginia
1
Yugoslavia
1