MATTICK, R. E. Geophysical studies in the Yuma area, Arizona and California / by R. E. Mattick, F. H. Olmsted and A. A. R. Zohdy. -- Washington : United States Government Printing Office, 1973 - 36 p. + map. -- (Geological Survey Professional Paper ; 726-D). Subjects--Topical Terms: ArizonaCaliforniaGeofísica Universal Decimal Class. No.: 550.8(791+794)