xi, 90 pages, 9 unnumbered pages : digital, PDF file
data file
OCLC
ocn180206398
Title from title screen (viewed on Nov. 1, 2007).
"January 31, 2002."
Mode of access: Internet from the Northwest Power and Conservation Council web site. Address as of 11/2/07: http://www.nwcouncil.org/library/2002/2002-3.pdf; current access available via PURL.