magnetic methods  search
BTgeophysical methods
 .magnetic methods
RTgeophysical surveys
 aeromagnetic maps
 airborne methods
 magnetic survey maps
 magnetic field
 magnetic anomalies
 audiomagnetotelluric methods
 CSAMT methods
 magnetic properties
 deep magnetic sounding
 magnetic logging
 nonmagnetic minerals
 magnetometers
 Magsat
SNBefore 1974, also search aeromagnetic surveys; aeromagnetic. For surveys, search with geophysical surveys and an area. For surveys, also index geophysical surveys and the area.