The rivers and valleys of Pennsylvania
By: by William Morris Davis.
Contributors: National Geographic Society (U.S.)
Publisher: National Geographic Society
Published: 1889
Place of publication: Washington, D.C
Language: eng
Number of pages: 253
Subjects: Rivers -- Pennsylvania; Geology, Stratigraphic; Geology -- Pennsylvania
Notes: Caption title.

"The substance of this essay was presented to the Society in a lecture on February 8th, 1889, but since then it has been much expanded."

Detached from: The National geographic magazine, v. 1, no. 3; with original paper covers of issue no. 3 bound in.