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Glacial gravels

MLA citation style
Geyer, A. R. “Glacial Gravels”. no date. 9390, 1970July .
APA citation style
Geyer, A. R. (1970). Glacial gravels. 9390. Retrieved from https://digitalarchives.powerlibrary.org/papd/islandora/object/papd%3A117664
Chicago citation style
Geyer, Alan R. “Glacial Gravels”. 9390, Pennsylvania Geological Survey - Historical Photographs, July 1970. https://digitalarchives.powerlibrary.org/papd/islandora/object/papd%3A117664.
Note: These citations are programmatically generated and may be incomplete.