neutron-gamma methods  search
BTgeophysical methods
 .neutron-gamma methods
RTwell-logging
 gamma rays
 radioactivity
 gamma-gamma methods
 gamma-ray methods
 neutron methods
 neutron-neutron methods
SNFor surveys, search with geophysical surveys and an area. For surveys, also index geophysical surveys and the area. Index well-logging if applicable. Added to Thesaurus in 1984.