Region
Asia
1
China
1
Cincinnati
1
Denver Region (Colo.)
1
Europe
2
Florida
1
Great Britain
2
Illinois
1
India
1
Japan
2
Mexico
1
Ohio
1
Rocky Mountains Region
1
Saint Kitts and Nevis
1
South Africa
1
Southern States
2
Soviet Union
1
Standing Rock Indian Reservation (N.D. and S.D.)
2
Technology and civilization
1
Tzintzuntzan (Mexico)
2
United States
684
Washington (D.C.)
1
États-Unis
1