00775cam a22002411 4500 gs 34000052 DLC 20260227111338.0 790614s1933 nbua b s000 0 eng gs 34000052 (OCoLC)5066359 DLC TxCM DLC premarc QE135 .A43 no. 1 Condra, Geo. E. (George Evert), 1869-1958. The Grenola formation, by G. E. Condra and C. E. Busby. [Lincoln] Printed by the authority of the state of Nebraska, 1933. 31 p. illus. Nebraska Geological Survey Paper no. 1 Bibliographical foot-notes. Geology Nebraska. Busby, Clarence Edward, 1907- joint author. 27075 27075