Subject Region
United States
175
Texas
17
Pennsylvania
10
Michigan
5
Nebraska
5
Colombia
4
Indiana
4
California
3
Espana
3
France
3
Iowa
3
New York (State)
3
Ohio
3
Spain
3
Tennessee
3
Baltimore
2
Chile
2
Great Britain
2
Illinois
2
Lubbock
2
Maryland
2
New York
2
Odessa
2
Omaha
2
Peru
2
University Park
2
Washington (State)
2
Alabama
1
Ann Arbor
1
Arizona
1
Arkansas
1
Baton Rouge
1
Bloomington
1
Bogota
1
Buffalo
1
Canada
1
Clemson
1
Dubuque
1
Easton
1
Easton (Northampton County)
1
Ecuador
1
Florida
1
Georgia
1
Indianapolis
1
Kitchener
1
Lehigh River Valley
1
Little Rock
1
Little Rock (Ark.)
1
Louisiana
1
Massachusetts
1
more ...