Guide to the geology of the upper Schuylkill valley
Subtitle: by Bradford Willard
Series: Pennsylvania. Geological survey. Fourth series. Bulletin G 14; Progress report (Pennsylvania. Bureau of Topographic and Geologic Survey) -- G14.
Publisher: Dept. of internal affairs, Topographic and geologic survey
Published: 1939
Place of publication: Harrisburg, Pa
Language: eng
Number of pages: 23
Subjects: Geology
Notes: On cover: Commonwealth of Pennsylvania. Department of internal affairs.

"List of references": p. 21-23.