http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
fluorspar industry of the United States with special reference to Illinois-Kentucky district
In cooperation with the United States Department of the interior. Buearu of mines.
At head of title: State of Illinois ... Department of registration and education ... Division of the State geological survey.
Bulletin (Illinois State Geological Survey) ; no. 59