http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Feldspar in Illinois sands, a study of resources
by H. B. Willman. Printed by authority of the state of Illinois.
At head of title: State of Illinois, Dwight H. Green, Governor. Dept. of Registration and Education, Frank G. Thompson, Director. Division of the State Geological Survey, M. M. Leighton, Chief, Urbana.
Report of investigations (Illinois State Geological Survey) ; no. 79