00929cam a22002411 4500 gs 42000234 DLC 20260227111348.0 790608s1942 ilua s000 0 eng gs 42000234 (OCoLC)5048466 DLC TxCM DLC premarc TN948.F3 W5 Willman, H. B. (Harold Bowen), 1901- Feldspar in Illinois sands, a study of resources, by H. B. Willman. Printed by authority of the state of Illinois. Urbana, Illinois, 1942. 87 p. illus. Illinois State Geological Survey Report of investigations no. 79 At head of title: State of Illinois, Dwight H. Green, Governor. Dept. of Registration and Education, Frank G. Thompson, Director. Division of the State Geological Survey, M. M. Leighton, Chief, Urbana. Feldspar. Sand. 27819 27819