00867cam a22002531 4500 gs 47000023 DLC 20260227111352.0 750812s1946 xx 000 0 eng gs 47000023 (OCoLC)1538694 DLC ViW DLC premarc QE770 .G7 Greacen, Katherine Fielding, 1913- , comp. Silurian invertebrate fossils from Illinois in the Thomas A. Greene Memorial museum at Milwaukee-Downer college, compiled by Katherine F. Greacen and John R. Ball. [Milwaukee, Wis., 1946] 61 p. 22 cm. Milwaukee-Downer college bulletin Bibliography: p. 57-61. Paleontology Silurian. Paleontology Illinois. Ball, John Rice, 1881- , joint comp. 28126 28126