IODP SEDIS - Thesaurus -

refraction
RT	diffraction
	elastic waves
	electrical methods
	geophysical surveys
SN	For seismic studies, use refraction methods. For minerals, use refractive index.

refraction method

refraction methods
BT	geophysical methods
	.refraction methods
RT	seismology
	acoustical methods
	geophysical surveys
	seismic methods
	electrical methods
	ECORS
	diffraction
	sonobuoys
SN	Restricted to geophysical methods; most commonly used for seismic methods. Indexed with seismic methods or other types of methods as applicable.

refraction waves
SN	As of 1981, no longer a valid index term for GeoRef. Before 1978, also search ocean waves AND refraction.