http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
economic comparison of the irrigation of corn in humid and arid regions of the United States
The net economic benefits for Midwestern vs. Western irrigation investments
A completion report for Project A-059-index, entitled "The net economic benefits for Midwestern vs. Western irrigation investments."
Technical report (Purdue University. Water Resources Research Center) ; no. 142