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Massive Conemaugh sandstone

MLA citation style
Johnson, M. E. “Massive Conemaugh Sandstone”. no date. 442, 1921July .
APA citation style
Johnson, M. E. (1921). Massive Conemaugh sandstone. 442. Retrieved from https://digitalarchives.powerlibrary.org/papd/islandora/object/papd%3Aspgsl-photo_324
Chicago citation style
Johnson, Meredith E. “Massive Conemaugh Sandstone”. 442, Pennsylvania Geological Survey - Historical Photographs, July 1, 1921. https://digitalarchives.powerlibrary.org/papd/islandora/object/papd%3Aspgsl-photo_324.
Note: These citations are programmatically generated and may be incomplete.