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Gravel at bottom of filling in old pre-Illinoian channel of Monongahela River

MLA citation style
Ashley, G. H. (G. H. ). “Gravel At Bottom Of Filling In Old Pre-Illinoian Channel Of Monongahela River”. no date. 2302, 1926Oct. .
APA citation style
Ashley, G. H. (G. H. ). (1926). Gravel at bottom of filling in old pre-Illinoian channel of Monongahela River. 2302. Retrieved from https://digitalarchives.powerlibrary.org/papd/islandora/object/papd%3Aspgsl-photo_1838
Chicago citation style
Ashley, Geo. H. (George Hall). “Gravel At Bottom Of Filling In Old Pre-Illinoian Channel Of Monongahela River”. 2302, Pennsylvania Geological Survey - Historical Photographs, October 6, 1926. https://digitalarchives.powerlibrary.org/papd/islandora/object/papd%3Aspgsl-photo_1838.
Note: These citations are programmatically generated and may be incomplete.