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

"May 6, 1950."

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

"IMSRP-IV."

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."

Illinois natural resources : an industrial developmental asset /

Cover title.

Municipal parks and playgrounds in Illinois. August, 1939.

Mode of access: Internet.

George Rogers Clark and the revolution in Illinois, 1763-1787; a sesquicentennial memorial,

Mode of access: Internet.

Bulletin - Illinois Natural History Survey.

Chemical abstracts

Municipal water supplies of Illinois,

Illinois. University. Bulletin, v. 5, no. 7.

Story of Illinois series.

Mode of access: Internet.

Geological Survey of Illinois,

Vol. 8 edited by Josua Lindahl, state geologist.

Southern Illinois novaculite and novaculite gravel for making silica refractories /

Includes bibliographical references.

Report of Illinois Good Roads Commission to the forty-fourth General Assembly.

Mode of access: Internet.