Guide to the geology of Cornwall, Pennsylvania, by Carlyle Gray, Davis M. Lapham.

By: Gray, CarlyleContributor(s): Lapham, Davis MMaterial type: TextTextReference number:1986471Series: General geology report ; G35.Publication details: [Harrisburg] Topographic and Geologic Survey, 1961. Description: vi, 18 p. illus. (part folded in pocket) maps. 23 cmSubject(s): Geology -- Pennsylvania -- Lebanon County | Geology, Stratigraphic | Mines and mineral resources -- Pennsylvania -- Cornwall
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