Distributed to depository libraries in microfiche.
"July 1992"--P. [2] of cover.
Also available via Internet from the Forest Service web site. Address as of 6/11/07: http://www.srs.fs.usda.gov/pubs/rb/rb%5Fse129.pdf ; current access is available via PURL.
Microfiche. [Washington, D.C.?] : Supt. of Docs., U.S. G.P.O., [1992]. 1 microfiche : negative.