SIERRA CLUB BULLETIN
Vol. 47, No. 9 (December, 1962). Fine. 
This issue contains "The Recession of Yosemite Valley" by William E. Colby, "Definitions for Inner Space" by David Brower, "California and the Human Prospect" by Lewis Muimford, "Must Logging Destroy Streams?" by Alex Calhoun, etc. Illus. with photos.
See all items in Natural History