Koons, E.D., 1955, Cliff retreat in the southwestern United States: American Journal of Science, v. 253, no. 1, p. 44-52. Authors Koons, E.D. Publication Date 1955 Citation American Journal of Science, v. 253, no. 1, p. 44-52. State AZ Province CP TR County MO Keywords Geomorphology Landscape Evolution More Keywords Geomorphology, Landscape Evolution, AzGeoBib RefNum 5500