[Washington, D.C.] : U.S. Environmental Protection Agency, Office of Water, [2002]
OCLC
ocm61817459
Title from title screen (viewed on Aug. 12, 2005).
"December 2002 rev."
"EPA 816-F-02-021."
Mode of access: Internet from the EPA web site. Address as of 8/12/2005: http://www.epa.gov/safewater/mdbp/pdfs/st1labqrg-final02rev.pdf; current access available via PURL.