Wild Animals at Home _E. T. Seton_ Our National Parks _John Muir_ Western Wild Flowers _Margaret Armstrong_ Flora of Colorado _Rydberg_ Mountain Wild Flowers of America _Julia Henshaw_ Rocky Mountain Wild Flowers _Clements_ Handbook of Birds of Western United States _Florence Merriam Bailey_ Wild Animals at Home _E. T. Seton_ The Mammals of Colorado _Warren_ The Adventures of James C. Adams _Hittel_ In Beaver World _Mills_ Manual of the Trees of North America _Sargent_ Field-Days in California _Torrey_ Trees of California _Jepson_ Three Wonderlands of the American West _Thomas D. Murphy_ BOOKS CONCERNING THE YELLOWSTONE NATIONAL PARK The Yellowstone National Park _Gen. H. M. Chittenden_ Catalogue of the Flora of Montana and the Yellowstone National Park. Memoirs of the New York Botanical Garden, vol. 1 _Rydberg_ Our National Recreation Parks _Nicholas Senn_ Southern California, Grand Canyon of the Colorado River, Yellowstone National Park. Lectures, vol. 10 _John L. Stoddard_ U. S. Geological Survey, Monograph 32, part 2. Descriptive Geology Petrography, and Paleontology of the Yellowstone National Park. BOOKS CONCERNING THE ROCKY MOUNTAIN NATIONAL PARK A Lady's Life in the Rocky Mountains _Bird_ Wild Life on the Rockies _Mills_ The Spell of the Rockies _Mills_ In Beaver World _Mills_ The Story of Estes Park _Mills_ Rocky Mountain Wonderland _Mills_ BOOKS CONCERNING THE MESA VERDE NATIONAL PARK Cliff Dwellers of Mesa Verde _G. Nordenskiöld_ The Land of the Cliff Dwellers _Chapin_ Government publications: Antiquities of Mesa Verde National Park, Bulletin Nos. 41 and 51, together with Excavations and Repair of Sun Temple. BOOKS CONCERNING THE GLACIER NATIONAL PARK The Ascent of Chief Mountain, in _Hunting in Many Lands_, edited by Theodore Roosevelt and George B. Grinnell. _Henry L. Stimson_ Blackfeet Tales of Glacier National Park _Schultz_ BOOKS CONCERNING YOSEMITE NATIONAL PARK