Annual report.

Report year ends November 30.

Report.

Mode of access: Internet.

Annual summary reports.

Mode of access: Internet.

Boone County surface water resources /

Bibliography: p. 73-76.

Bond County surface water resources /

Bibliography: p. 33.

Champaign County surface water resources.

Bibliography: p. 49-50.

Carroll County surface water resources /

Bibliography: p. 40-41.

Christian County surface water resources /

Bibliography: p. 40-42.

Clay County surface water resources /

Bibliography: p. 34-35.

DeWitt County surface water resources /

"April, 1969."