Beggs, S., 1988, Powell revisited: GSA's centennial trip into the Grand Canyon: Geological Society of America News and Information, v. 10, p. 161-162. Authors Beggs, S. Publication Date 1988 Citation Geological Society of America News and Information, v. 10, p. 161-162. State AZ Province CP County CN MO AzGeoBib RefNum 788
