Clements, Frederic Edward and Clements, Edith Schwartz. Rocky Mountain Flowers. New York, H. W. Wilson Company, 1920. 392 p. il. Field edit. A guide for plant-lovers and plant-users, with black and white and color plates.
Schmidt, C. C. Nature Study and Agriculture. Chicago, D. C. Heath, 1933. 508 p. il. Discussion by a University of North Dakota professor of education, based on appreciation of nature.
Stevens, O. A. Wild Flowers of North Dakota. North Dakota Agricultural College, Fargo, May 1933. 51 p. il. (Bull. 269.)
Fauna
Audubon, Maria R. and Coues, E. Audubon and His Journals. New York, Charles Scribner's Sons, 1897. o. p. 1086 p. 2 v. A description of Audubon's trip along the Missouri River, with zoological notes by Elliott Coues.
Bailey, Vernon. Biological Survey of North Dakota. Washington, Government Printing Office, 1926. o. p. 226 p. (U. S. Department of Agriculture, Bull. 49 in North American Fauna.) A study of North Dakota fauna.
Job, Herbert K. Among the Water-Fowl. New York, Doubleday, Page and Company, 1903. o. p. 224 p. il. A popular narrative account of waterfowl in the northern and middle States and lower Canada, east of the Rockies.
Judd, Elmer T. List of North Dakota Birds. Cando, N. Dak., published by author, 1917. 29 p. Birds in the Big Coulee, Turtle Mountain, and Devils Lake regions, as noted during the years 1890 to 1896 and verified in subsequent years.
Larson, Adrian. Birds of Eastern McKenzie County, North Dakota. Wilson Ornithological Club, Sioux City, Iowa, 1928. 19 p. Reprinted from Wilson Bulletin, March 1928, June 1928.