http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Geology and mineral resources of the Dixon quadrangle
At head of title: State of Illinois. Department of registration and education. Division of the State geological survey.
Published also as thesis (PH.D.) Columbia university, 1927.
Bulletin (Illinois State Geological Survey) ; no. 49