数量<6> v. : ill., maps ; 28 cm.
一般注記Pts. 3-5 are reissued corrected copies.
"Final report on task order no. 6"--Pt. 2.
"Final report on task order no. 10"--Pts. 3-4.
"Final report on task order no. 13"--Pt. 5.
"June, 1979"--Pt. 2; Covers, pts. 3-6.
"October, 1979"--Pts. 3-4.
"November, 1979"--Pt. 5.
"December 1979"--Pt. 6.
"EPA contract no. 68-01-3857."
"Report no. ADL 81099-63"--Pt. 6.
Description based on: Pts. 2-6.
書誌注記Includes bibliographical references.