Guide to the geology of Illinois Beach State Park and the Zion Beach-Ridge Plain, Lake County, Illinois /

"October 28, 2000."

Guide to the geology of Siloam Springs State Park area, Adams and Brown Counties, Illinois /

"May 13, 2000."

The inflammability of Illinois coal dusts.

Mode of access: Internet.

Earth history field trip for high school science teachers : Jacksonville, Illinois, October 22, 1949 /

Gilbert O. Raasch, Conference director; Principal John Agger, Conference host.

Oil investigations in Illinois in 1916, under direction of Fred H. Kay.

"Work in cooperation with U.S. Geological Survey."

Oil and gas development and possibilities in east-central Illinois. (Clark, Coles, Douglas, Edgar and parts of adjoining counties)

At head of title: State of Illinois. Department of registration and education. Division of the state geological survey.

Guide leaflet, geological science field trip, Wheaton area : DuPage and Kane Counties, Wheaton, Barrington, Elgin and Geneva quadrangles /

April 29, 1962.

Rock Island-Moline area : Rock Island County, guide leaflet for Illinois Academy of Science /

"May 6, 1950."

Guide leaflet, geological science field trip, Milan-Rock Island area : Rock Island and Henry Counties, Miland, Coal Valley, Port Byron, Green Rock, Davenport East and Silvis quadrangles /

September 17, 1960.

High-extraction coal mining in Illinois : effects on crop production, 1985-1987 /

"IMSRP-IV."

Geological science field trip guide leaflet : Hamilton area, Hancock County : Keokuk, Carthage, Fort Madison, and Lomax Quadrangles.

Bibliography included in abstract.

Illinois fluorspar /

Includes bibliographical references (p. 34-36).

Earth history field trip for high school science teachers : Vienna, Illinois, November 5, 1949 /

Gilbert O. Raasch, Conference director; Principal B.W. Hunsaker, Conference host.

Conservation school guide leaflet: Fairgrounds, Springfield, Illinois : Springfield area, Sangamon Co. : Springfield Quadrangle.

"Leader: George M. Wilson.

Pennsylvanian spores of Illinois and their use in correlation / by Robert M. Kosanke.

"Manuscript completed in August 1948."