Rocks and minerals of Pennsylvania
By: by John H. Barnes ; illustrations by Samuel W. Berkheiser, Jr.
Contributors: Berkheiser, Samuel W.; Geological Survey of Pennsylvania.
Edition: 3rd ed.
Series: Educational series / Pennsylvania Geological Survey -- 1.; Educational series (Harrisburg, Penn.) -- 1.
Publisher: Pennsylvania Geological Survey
Published: 1991
Place of publication: Harrisburg
Language: eng
Number of pages: 30
Subjects: Minerals -- Pennsylvania.; Minerals -- Pennsylvania -- Classification.