http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
fertile triangle :the interrelationship of air, water, and nutrients in maximizing soil productivity
xiii, 463 pages : illustrations ; 23 cm.
Includes bibliographical references (pages 439-452) and index.
A Sterling Salute in honor of James R. Crady III, Agriculture, by Rick and Debbie Crady ; May 1999.