1977. First edition. Hardcover. 129pp. Octavo [23.5 cm] Brown cloth covered boards with a black ink stamped title on the front cover. Near fine. The edges of the covers are lightly rubbed. Item #21576
From the first page- "Being a manuscript in which this deepest canyon on the North American Continent is intimately portrayed for the reader. The geology and geography of the canyon is summarized. The prehistory of the areas is outlined and the early history of the canyon related."