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Pennsylvania Geological Survey - Historical Photographs - Browse all items - Pennsylvania Photos and Documents
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Contributing Institution
Pennsylvania Geological Survey (880)
Subject
Stratigraphy (880)
Sedimentation (69)
Survey Staff (2)
Mineral Resources-Coal (1)
Weathering (1)
Location Covered
Lebanon (87)
Dauphin (60)
Allegheny (50)
Perry (47)
York (44)
Somerset (36)
Mifflin (30)
Lancaster (29)
Westmoreland (26)
Original Format
Photographs (880)
Date
1923-08-21 (17)
1936-08-01 (16)
1923-08-23 (15)
1972-09-21 (15)
1958-01-01 (14)
1968-01-01 (13)
1921-01-01 (12)
1923-10-03 (12)
1928-01-01 (12)
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Pennsylvania Geological Survey - Historical Photographs
880 items
880 items
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