http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Analyses of high-calcium chert-free beds in the Keokuk limestone, Cherokee County, Kansas
Bulletin (Kansas Geological Survey) ; 180, pt. 2
Reports of studies (Kansas Geological Survey) ; 1966, pt. 2