Hollidaysburg-Huntingdon folio, Pennsylvania
By: by Charles Butts
Series: U.S. Geological Survey. Geologic atlas of the United States -- no. 227; Geologic atlas of the United States -- fol. 227
Publisher: U.S. Geological Survey
Published: 1945
Place of publication: Washington, D.C
Language: eng
Number of pages: 20
Subjects: Geology; Maps
Notes: Cover title.