1956. Ohio State University. Institute of Geodesy, Photogrammetry and Cartography. Sponsored by the Development Fund, the Graduate School and the Department of Geology. The Anomalies refer to the International Gravity Formula. by ... Ohio. Division of Geological Survey.
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1956. Scale approximately 1:100,000; Location map on verso.
1956. Bier, James Allen. Scale 1:1,250,000. "Based primarily on U.S.G.S. topographic maps.". Ohio. Division of Geological Survey.
1956. George Philip & Son, Ltd. North Decimal Degree 90.000000. South Decimal Degree -90.0000. East Decimal Degree 180.0000. West Decimal Degree -160.000... London, UK : [s.n.], 1956.
1956. Henry, Everett. Pictorial world map. Cleveland, Ohio : Harris-Seybold Co., c1956.