Ogle County

Castle Rock State Park

Illinois. Department of Conservation

White Pines Forest State Park

Illinois. Dept. of Conservation

Veolia ES Orchard Hills Landfill and Winnebago Landfill odor issues: Ogle and Winnebago Counties, Illinois

State of Illinois, Illinois Environmental Protection Agency

Soil survey of Ogle County, Illinois

[by Lawrence L. Acker ... et al.] ; United States Department of Agriculture, Soil Conservation Service, in cooperation with the Illinois Agricultural Experiment Station.

Interaction of ground water with the Rock River near Byron, Illinois

by Charles Avery ; prepared in cooperation with the U.S. Environmental Protection Agency

Data from controlled drilling program in Lee and Ogle Counties, Illinois

compiled by Philip C. Reed

Ogle County, Illinois, marriage records, 1837-1850.

Robert L. Steenrod

Ogle County soils

by R.S. Smith ... [et al.].

White Pines Forest State Park

Illinois. Department of Conservation

The plant ecology of the Rock river woodlands of Ogle county, Illinois ...

by Howard De Forest ...