http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
by A. H. Bell. Economic position of the Illinois oil industry by W. H. Voskuil.
"Reprinted from the Oil and Gas Journal, volume 37, number 24, 1938."
Circular (Illinois State Geological Survey) ; 43