Cite

Citation Info Rock, Joseph Francis Charles, 1884-1962.. Simpson, William Ekvall, 1901-. Harvard Map Collection, Harvard College Library. (2006-10). Rock map of the Yellow River (Huang He) expedition, China, 1925-1927 : Sheet 4. [GeoTIFF]. Harvard Map Collection, Harvard College Library. Retrieved from https://geo.nyu.edu/catalog/harvard-rockmapiv-453931

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