Graphite deposits of Pennsylvania
By: by Benjamin L. Miller ...
Series: Pennsylvania.  Topographic and geologic survey.  Report; no. 6
Publisher: C.E. Aughinbaugh, printer to the state of Pennsylvania
Published: 1912
Place of publication: Harrisburg
Language: eng
Number of pages: 148
Subjects: Graphite -- Pennsylvania
Notes: Bibliograhy: p. 129-140.