1966
Folded Structure. Harrisburg
Scovel, James L. ; O'Brien,
0889.020
|
1966
Folds. Loysvill, PA. Folded
Scovel, James L. ; O'Brien,
0889.021
|
1872
Penn. geological formations.
Lesley, J. P. (J. Peter), 18
1155.001
|
1858
Geological Map Of The State
Rogers, Henry Darwin
4120.000
|
1850
Bradys Bend, Armstrong Count
Franks, Theo.; Brady's Bend
5002.000
|
1960
Pennsylvania -- Geology
Topographic and Geologic Sur
7148.000
|