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Contributing Institution
Pennsylvania Geological Survey (139)
Subject
Glacial Geology (139)
Topography (1)
Location Covered
Erie (24)
Tioga (17)
Warren (15)
Lackawanna (10)
Luzerne (8)
Northampton (8)
Lycoming (6)
Northumberland (6)
Mercer (5)
Snyder (5)
Original Format
Photographs (139)
Date
1921-08-07 (10)
1931-08-01 (10)
1930-08-03 (9)
1926-09-01 (6)
1930-07-30 (5)
1930-07-31 (5)
1921-09-22 (4)
1926-10-06 (4)
1931-02-24 (4)
Collection homepage
Pennsylvania Geological Survey - Historical Photographs
139 items
139 items
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