http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Groundwater geology in western Illinois, south part, a preliminary geologic report
[by] Robert E. Bergstrom [and] Arthur J. Zeizel.
"Replacement for fig. 6, page 10": leaf inserted.
Circular (Illinois State Geological Survey) ; 232