Original 1st printing (Bindweed Press, yellow background) 14&1/4 x 20" conference/event poster for the Sierra Club's 10th Biennial Wilderness Conference held at the Hilton Hotel in San Francisco, CA on 4/7-9/1967. Art by Stanley Mouse (who also SIGNED the poster in gold ink) and Alton Kelley, the image (2nd/no yellow edition) is featured in the Art of Rock book on page 239 (plate 2.365). Medium flat vellum stock poster is in excellent to near mint (B+ to B+/A-) condition; aside from a touch of curling, a tiny dog-eared bottom right corner tip and a few scattered pinch bends/dings, it is a GORGEOUS-looking example of this classic 1967 Mouse/Kelley poster from the AOR with a nice fat gold signature.