Twenter, F. R. Geology and ground water in Verde valley-the Mogollon Rim Region Arizona / by F. R. Twenter and D. G. Metzger. -- Washington : United States Government Printing Office, 1963 - 132 p. + map. -- (Geological Survey Bulletin, 1177). Subjects--Topical Terms: ArizonaGeología Universal Decimal Class. No.: 55(791)