01061cam a22002651 4500 gs 28000444 DLC 20260227111333.0 771202s1928 inua b 000 0 eng gs 28000444 (OCoLC)3460790 DLC OT OCoLC DLC QE661 .C8 Cumings, E. R. (Edgar Roscoe), 1874-1967. The geology of the Silurian rocks of northern Indiana, by Edgar R. Cumings and Robert R. Shrock ... Div. of geology ... Conservation commission. Indianapolis, W. B. Burford Print. Co., 1928. 226 p. incl, ill., tables. diagrs. (part fold.) 23 cm. Indiana. Dept. of Conservation. Publication no. 75 Bibliography: p. 194-201. Geology Indiana. Geology, Stratigraphic Silurian. Shrock, Robert R. (Robert Rakes), 1904-1993, joint author. Silurian rocks of northern Indiana. Indiana. Department of Conservation. Publication no. 75. 26682 26682