http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Geology for planning in Boone and Winnebago counties
Richard C. Berg, John P. Kempton, Amy N. Stecyk ; with contributions by Jonathan H. Goodwin [and others] ; [graphic artist, Craig Ronto ; editor, Mary Glockner].
Circular (Illinois State Geological Survey) ; 531