00926cam a22002771 4500 gs 12000754 DLC 20260227111313.0 790822s1912 dcuf f001 0 eng gs 12000754 (OCoLC)5297993 DLC ICharE DLC premarc n-us-oh x1x1 QE75 .B9 no. 518 Marshall, R. B. (Robert Bradford), 1867-1949 Results of spirit leveling in Ohio, 1911. R. B. Marshall, chief geographer; work done in cooperation with the state of Ohio, C. E. Sherman, inspector. Washington, Govt. Print. Off., 1912. 108 p. pl. 24 cm. U.S. Geological survey. Bulletin 518 Includes index. Ohio Altitudes. Geological Survey of Ohio. United States. Geological Survey. Bulletin ; 518. 25183 25183