Also available via Internet from the SRS web site. Address as of 3/31/05: http://www.srs.fs.usda.gov/pubs/gtr/gtr%5Fsrs021.pdf; current access is available via PURL.
Microfiche. [Washington, D.C.] : Supt. of Docs., U.S. G.P.O., 1999 1 microfiche : negative.