00886cam a22002411 4500 gs 43000070 DLC 20260227111349.0 780911s1943 iluab s000 0 eng gs 43000070 (OCoLC)4212599 DLC UU OCoLC DLC premarc QE471 .W53 552/.55 Willman, H. B. (Harold Bowen), 1901- High-purity dolomite in Illinois, by H.B. Willman. Urbana, Ill., 1943. 87,[2]p. incl. maps. tables. 25cm. Illinois. State geological survey. Report of investigations no. 90 At head of title: State of Illinois, Dwight H. Green, governor. Dept. of registration and education, Frank C. Thompson, director. Division of the State geological survey, M.M. Leighton, chief. Dolomite. 27907 27907