Industrial minerals of the midcontinent : proceedings of the Midcontinent Industrial Minerals Workshop / edited and compiled by Alfred L. Bush and Timothy S. Hayes ; prepared in cooperation with the U.S. Bureau of Mines ... [et al.].
Imprint
Washington : U.S. G.P.O. ; Denver, CO : For sale by U.S. Geological Survey, Information Services, 1995.
"Presentations and discussions at a Workshop, September 16 and 17, 1991, in St. Louis, Missouri held to probe the issues and options that impact the current situation in the field of inudstrial minerals, the availability, needs, problems, and plans of resources in the central midcontinent region of the United States."
"U.S. Department of the Interior, U.S. Geological Survey"--T.p. verso.
