Clarke, James W. Geophysical abstracts 181 april-june 1960 / by James W. Clarke, Dorothy B. Vitaliano, Virginia S. Neusche. -- Washington : United States Government Printing Office, 1960 - P. 129-279. -- (Geological Survey Bulletin ; 1116-B). Subjects--Topical Terms: Geofísica Universal Decimal Class. No.: 550.3