http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Proceedings of the Symposium on Land Treatment of Secondary Effluent, November 8-9, 1973, University of Colorado
Symposium on Land Treatment of Secondary Effluent, University of Colorado (1973)
Information series (Colorado State University. Environmental Resources Center) ; no. 9