http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Irrigated and dryland grain sorghum production, South and southwest Texas
Irrigated and dryland sorghum production, South and southwest Texas
Charles Stichler, Mark McFarland, and Cloyce Coffman.
Includes bibliographical references (page 12).