Sewickley folio, Pennsylvania
By: by M. J. Munn
Edition: Library ed.
Series: U. S. Geological Survey. Geologic atlas of the United States -- no. 176; Geologic atlas of the United States -- fol. 176
Publisher: U. S. Geological Survey
Published: 1911
Place of publication: Washington, D. C
Language: eng
Number of pages: 16
Subjects: Geology; Maps
Notes: Cover title.