Mineralogy of glacial tills and their weathering profiles in Illinois :
Part I. Glacial tills /
H.B. Willman, H.D. Glass, John C. Frye.

APA Citation

Willman, H. B. (Harold Bowen)., Frye, J. Chapman., Glass, H. D. (Herbert David)., Illinois State Geological Survey. (1963). Mineralogy of glacial tills and their weathering profiles in Illinois: Part I. Glacial tills. Urbana, Ill.: State of Illinois, Department of Registration and Education, Illinois State Geological Survey.

MLA Citation

Willman, H. B. (Harold Bowen), 1901-, John Chapman Frye, H. D. (Herbert David) Glass, and Illinois State Geological Survey. Mineralogy of Glacial Tills And Their Weathering Profiles In Illinois: Part I. Glacial Tills. Urbana, Ill.: State of Illinois, Department of Registration and Education, Illinois State Geological Survey, 1963.