Clarke, James W. Index to geophysical abstracts 184-187 1961 / by James W. Clarke, Dorothy B. Vitaliano, Virginia S. Neuschel. -- Washington : United States Government Printing Office, 1962 - P. 709-822. -- (Geological Survey Bulletin ; 1146-E). Subjects--Topical Terms: Geofísica Universal Decimal Class. No.: 550.3