Aids to identification of geological formations,

Mode of access: Internet.

Circular - Illinois State Geological Survey.

At head of title: State of Illinois, Department of Registration and Education.

Bulletin - State of Illinois, Department of Registration and Education, Division of the State Geological Survey.

Mode of access: Internet.

Reports (geological and general) resulting from the explorations made by the government geologist and staff during 1905. Minister controlling Northern Territory--Hon. L. O'Loughlin ...

"Official contributions to the palæontology of South Australia, by R. Etheridge, jun.": p. 41-42.

Guide to the geological model of the isle of Purbeck,

"Corrections and emendations by Dr. F.L. Kitchin."--Pref.

The geological history of Lake Superior

Reproduction of original in: National Library of Canada.

Additions to the Geological Samples Library.

Mode of access: Internet.

Geological-Geotechnical studies for siting the superconducting super collider in Illinois : results of drilling large-diameter test holes in 1986 /

Bibliography: p. 42-44.

Geological-geotechnical studies for siting the superconducting super collider in Illinois : results of the 1986 test drilling program /

Bibliography: p. 106-107.

Illinois heritage.

Cover title.

Illinois heritage : discover the magnificent miles of Illinois.

Cover title.

Illinois State Geological Survey : [annual report].

Description based on: 1987-88; title from cover.

Preserving Illinois' natural heritage : biennial report, 1975-1976 /

Cover title.

Review of Illinois State Geological Survey activities.

Report year ends Apr. 30.

The Illinois natural areas plan to preserve and protect our heritage.

Cover title.