Pittsburgh quadrangle
Subtitle: geology and mineral resources
By: by Meredith E. Johnson
Series: Pennsylvania. Geological survey (4th, 1919- ) Topographic and geologic atlas of Pennsylvania -- no. 27; Atlas (Pennsylvania. Bureau of Topographic and Geologic Survey) -- no. 27.
Published: 1929
Place of publication: Harrisburg]
Language: eng
Number of pages: 236
Copyright date: 1929
Subjects: Geology
Notes: Includes bibliographical references.