Includes bibliographical references (pages 22-23).
Also available via Internet from the Office of Dietary Supplements web site (PDF file only). Address as of 6/23/99: http://odp.od.nih.gov/ods/publications/ods%5Fplan.pdf; current access is available via PURL.
Microfiche. [Washington, D.C.] : Supt. of Docs., U.S. G.P.O., [1999] 1 microfiche : negative.