Description
Item Description:Description based on: 1987 (published in 1990); title from title screen (viewed June 11, 2009).
Latest issue consulted: 2003.
Electronic resource.
Physical Description:volumes : digital, PDF files.
Also issued in print and microform.
Publication Frequency:Triennial
Format:Mode of access: Internet via the U.S. Forest Service web site and GPO's Permanent Server. Address as of 06/11/09: http://permanent.access.gpo.gov/lps113125 ; current access is available via PURL.