Constitution diagrams of Pennsylvania anthracite
By: by Holly C. Wagner.
Series: Contributions to economic geology; Geological Survey bulletin -- 995-A
Publisher: U.S. G.P.O.
Published: 1953
Place of publication: Washington
Language: eng
Number of pages: 18
Subjects: Anthracite coal -- Pennsylvania -- Northumberland County.; Coal -- Geology -- Pennsylvania -- Northumberland County.; Geology, Economic -- Pennsylvania -- Northumberland County.
Notes: Diagrams on two folded plates in pocket (plates 6 and 7).

Correction slip attached to plate 7 in pocket.

Includes bibliographical references (p. 17-18).