U.S. Department of Agriculture, Forest Service, 1991. Hardcover. 533pp. Quarto [29 cm] White, green and black illustrated cloth covered boards. Very good. The extremities are bumped. There are a couple of minor traces of soiling on the covers. The front free endsheet has a previous owner's name and a brief notation that has been crossed out. Item #35314
United States Department of Agriculture, Forest Service, Pacific Northwest Research Station, General Technical Report PNW-GTR-285, May 1991.