http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Origin and paleoenvironment of some cambrian algal reefs, Mason County area, Texas microform]
Microfilm. Ann Arbor, MI : University Microfilms International, 1967. 1 microfilm reel ; 35 mm.