Publicado por U. S. Department of Agriculture, Forest Service, 1995
Librería: Sandhill Books, Spring Green, WI, Estados Unidos de America
Soft cover. Condición: Very Good. Photos throughout, 102 pages, 27cm tall, quarto. Research Paper PNW-GTR-315. "Photographs taken before 1925 were compared with photographs taken as recently as 1992 to interpret changes within ecosystems in the Blue Mountains of Oregon." Covers show very light rubbing. A clean copy and fine internally. n.