Includes bibliographical references (pages 63-66).
Also available via Internet from the USDA Web site. Address as of 3-11-03: http://www.ers.usda.gov/publications/aer815/aer815.pdf; current access is available via PURL.
Microfiche. [Washington, D.C.] : Supt. of Docs., U.S. G.P.O., 2003 1 microfiche : negative.