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Glacial gravel beside highway

MLA citation style
Ashley, G. H. (G. H. ). “Glacial Gravel Beside Highway”. no date. 691, 1922Oct. .
APA citation style
Ashley, G. H. (G. H. ). (1922). Glacial gravel beside highway. 691. Retrieved from https://digitalarchives.powerlibrary.org/papd/islandora/object/papd%3Aspgsl-photo_442
Chicago citation style
Ashley, Geo. H. (George Hall). “Glacial Gravel Beside Highway”. 691, Pennsylvania Geological Survey - Historical Photographs, October 11, 1922. https://digitalarchives.powerlibrary.org/papd/islandora/object/papd%3Aspgsl-photo_442.
Note: These citations are programmatically generated and may be incomplete.