Structure-contour maps of the plateau region of north-central and western Pennsylvania.
Contributors: Pennsylvania. Bureau of Topographic and Geologic Survey
Series: Pennsylvania.  Topographic and Geologic Survey.  Bulletin G27
Publisher: Dept. of Internal Affairs, Topographic and Geological Survey
Published: 1954
Place of publication: [Harrisburg, Pa.]
Language: eng
Number of pages: 2524
Subjects: Geology -- Pennsylvania -- Maps