Prairie Parklands area assessment.

Examines 1,477 square miles in northeastern Illinois that historically was open prairie with a park-like appearance of scattered trees. The area encompasses 25 subbasins along the Illinois, Des Plaines, and Kankakee rivers, of which 8 have been designated a state Resource Rich Area.

Sinkhole Plain area assessment.

"Examines a karst/cave area in southwestern Illinois bordering the Mississippi River ... designated a state Resource Rich Area."--P. iii.

Spoon River area assessment.

"Examines the Spoon River basin in west central Illinois"--P. iii.

Sugar-Pecatonica area assessment.

"Examines an area in north central Illinois along the Wisconsin/Illinois border ... designated a state Resource Rich Area."--P. iii.

Thorn Creek area assessment /

Examines a small area of southern Cook County and northeastern Will County in Illinois--a portion of which has been designated a state Resource Rich Area.

Upper Sangamon River area assessment.

"Examines an area of more than 1,200 square miles in east central Illinois ... designated a state Resource Rich Area."--P. iii.

Vermilion River area assessment.

Examines an area in east central Illinois along the Indiana/Illinois border designated a state Resource Rich Area.

Cooperative mining series.

No. 1 (Preliminary report on organization and method of investigation) published without series title or number.

Biological series.

Mode of access: Internet.

Waukegan area : Lake County /

"October 7, 1950."

Reports

Mode of access: Internet.

Cooperative mining series /

Latest issue consulted: Bulletin 31, published 1927.

Water resources data for Michigan.

Description based on: 1980.

Report of investigations - Tennessee Division of Geology.

Chemical abstracts

Information circular - Division of Geology.

Each no. has also a distinctive title.