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770 foot terrace of Allegheny River gravel

MLA citation style
Johnson, M. E. “770 Foot Terrace Of Allegheny River Gravel”. no date. 1628, 1926May .
APA citation style
Johnson, M. E. (1926). 770 foot terrace of Allegheny River gravel. 1628. Retrieved from https://digitalarchives.powerlibrary.org/papd/islandora/object/papd%3Aspgsl-photo_1248
Chicago citation style
Johnson, Meredith E. “770 Foot Terrace Of Allegheny River Gravel”. 1628, Pennsylvania Geological Survey - Historical Photographs, May 21, 1926. https://digitalarchives.powerlibrary.org/papd/islandora/object/papd%3Aspgsl-photo_1248.
Note: These citations are programmatically generated and may be incomplete.