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Author
- Geological Survey (U.S.)348
- Wood, Gordon H. (Gordon Harry), 1919-13
- Geological Survey of Pennsylvania6
- Kent, Bion H. (Bion Huntley), 1925-6
- Pennsylvania. Bureau of Topographic and Geologic Survey4
- Rand McNally and Company4
- Roen, John B.4
- Stose, George Willis, 1869-19604
- Tanner, Henry Schenck, 1786-1858, cartographer, publisher4
- United States. Army Map Service4
- United States. Bureau of Public Roads4
- Arndt, Harold H.3
- Berryhill, Henry L. (Henry Lee), 1921-3
- Howell, Reading, 1743-1827, cartographer3
- Rand McNally and Company, cartographer, publisher3
- Rothrock, Howard Eugene, 1893-3
- Schweinfurth, Stanley P.3
- Trexler, J. Peter, 1926-3
- Young, J. H. (James Hamilton), cartographer3
- Barnes, Rufus L., cartographer, publisher2
