Jennes, G., 1978, Work of H. B. Washburn to map the Grand Canyon: People, v. 10, p. 40-42. Authors Jennes, G. Publication Date 1978 Citation People, v. 10, p. 40-42. State AZ Province CP TR County CN MO Keywords History Areal More Keywords History, Areal, AzGeoBib RefNum 4917
