FITCH, A. A. DEVELOPMENTS IN GEOPHYSICAL EXPLORATION METHODS 2 - 0 - LONDON-U.S.A. APPLIED SCIENCE PUBLISHIN 1981 - 234 pag 23 cm - 0 0 . ISBN: 0-85334-930-4 Subjects--Topical Terms: CIENCIAS PURAS Dewey Class. No.: 551 / F58