The midcontinent strategic and critical minerals project : summary and background information to accompany folio of maps of the northern midcontinent area, latitude 30⁰-46⁰ N. and longitude 88⁰-100⁰ W. /
Pratt, Walden P.
Washington, DC : U.S. G.P.O. : Denver, CO : For sale by U.S. Geological Survey, Information Services,
1995.
"Prepared in cooperation with the geological surveys of Arkansas, Illinois, Iowa, Kansas, Kentucky, Minnesota, Missouri, Nebraska, Oklahoma, South Dakota, Tennessee, and Wisconsin."
Includes bibliographical references (p. 18-19).
Mines and mineral resources