The mineral industry of Pennsylvania in 1972
By: Franklin D. Cooper.
Series: Information circular - Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey ; 78
Publisher: Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey
Published: 1975
Place of publication: [Harrisburg]
Language: eng
Number of pages: 52
Subjects: Mineral industries -- Pennsylvania.
Notes: Includes bibliographical references.
Cover title.