Region
Pennsylvania
109
England
37
Northumberland County (Pa.)
30
Northumberland County
29
United States
14
Ohio
11
Philadelphia (Pa.)
10
Penn
8
Great Britain
7
New York (State)
6
Berks County (Pa.)
5
Delaware
5
Montour County
5
Montour County (Pa.)
5
Philadelphia
5
Bucks County (Pa.)
4
Reading
4
Virginia
4
Chester Co
3
Chester County
3
Erie County
3
Erie County (Pa.)
3
Kentucky
3
Lancaster Co
3
Philadelphia (Pa.)--Social life and customs--20th century
3
Philadelphia County (Pa.)
3
Somerset County
3
Albemarle County (Va.)
2
Blair County
2
Buckinghamshire
2
Buckinghamshire (England)
2
Bucks Co
2
Bucks County
2
California
2
Chester County (Pa.)
2
Clearfield County
2
Colorado
2
Columbia County
2
Columbia County (Pa.)
2
Conservation of natural resources
2
Delaware Co
2
Delaware County
2
Delaware County (Pa.)
2
Delta County
2
Dorset
2
Dorset (England)
2
Elk County
2
Environmental policy
2
Fremont County
2
Germantown (Philadelphia, Pa.)
2
more ...