Editore: Aquatic Plant & Insect Control Comm, Pacific NW River Basins Comm, Vancouver, WA, 1968
Da: Larry W Price Books, Portland, OR, U.S.A.
Prima edizione
Paperback. Condizione: Fine. 1st Edition. 30 pp., Photos + FoldOut Chart, Yellow-Grn Illus Paperback, 4to, Fine, Assumed 1st ed.