Region
United States
15
Minnesota
4
Pennsylvania
4
Detroit (Mich.)
3
Australia
2
Canada
2
Connecticut
2
Detroit
2
Michigan
2
New York (N.Y.)
2
San Francisco Bay Area (Calif.)
2
Toronto (Ont.)
2
America
1
California
1
Cambridge (Mass.)
1
Cleveland (Ohio)
1
Delaware
1
Hawaii
1
Hibbing
1
Hibbing (Minn.)
1
Mesabi Range (Minn.)
1
Minneapolis (Minn.)
1
Northampton County (Pa.)
1
Oley Valley (Pa.)
1
Pittsburgh
1
Pittsburgh (Pa.)
1
Rochester (N.Y.)
1
Saint Paul (Minn.)
1
South Bend (Ind.)
1
Wisconsin
1