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VLF duration 4 minutes 51 seconds VLF VLF	VLF Demonstration of how to make VLF measurements used in geophysical surveying. geophysics instrument orientation sound quadrature antennae types meter thing degrees eyepiece bit reason signal things antenna instruments applications exploration mineral hammer From Wyn Williams 0 likes 19 plays 0 Course Code EASC08008 Licence Type All rights reserved The University of Edinburgh Language English Date Created October 20th, 2020