David Rumsey
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Folded Structure. Harrisburg, PA. Geologic Map of Harrisburg, PA.
0889.020
default
Folded Structure. Harrisburg, PA. (opposite page) Geologic Map of Harrisburg, PA. 1:150,000. Folds.
1966
O'Brien, Emmett J
John Wiley & Sons Inc.
71 × 31 cm
1 : 250000