Cover title.
"Working draft."
Distributed to depository libraries in microfiche.
Shipping list no.: 98-0378-M.
"June 9, 1997."
"EPA contract no. 68-W5-0054, work assignment no. II-9, SAIC project no. 01-0833-08-0645-040."
Microfiche. [Washington, D.C.] : Supt. of Docs., U.S. G.P.O., 1998 3 microfiches : negative.