Publisher: Harrisburg : Pennsylvania Geological Survey, 1975.
Description: xii, 228 p. : ill. ; 23 cm. + 2 folded maps.
Notes: On spine: Geology of the Sinking Spring quadrangle; Issued in a case; Bibliography: p. 213-217; Clarion University Faculty publication.
Series: Atlas (Pennsylvania. Bureau of Topographic and Geologic Survey) ; 177d.
Other title: Geology and mineral resources of the Sinking Spring quadrangle ...; Geology of the Sinking Spring quadrangle.