Papers, 1873-1875.
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Sheafer, P. W. (Peter Wenrick), 1819-
http://n2t.net/ark:/99166/w6rr43cx (person)
Peter W. Sheafer, a geologist and mining engineer, compiled the Historical Map of Pennsylvania (Philadelphia, 1875). From the description of Papers, 1873-1875. (Historical Society of Pennsylvania). WorldCat record id: 122589949 ...