Vol. for 1st ed. distributed to depository libraries in microfiche.
Issued also on CD-ROM.
Also available in searchable database version via Internet from the EPA web site, with title: United States. Environmental Protection Agency. EPA national publications catalog (Online). Address as of 11/19/99: http://www.epa.gov/ncepihom/catalog.html; current access is available via PURL.
Microfiche Supt. of Docs., U.S. G.P.O.
United States. Environmental Protection Agency. EPA national publications catalog (CD-ROM)