"Refraction" . "false" . . "Refraction"@en . "SDN:P02::SRFR" . . . . "1" . "2007-11-22 11:35:40.0" . "accepted"@en . . "Seismic refraction"@en . . "SDN:P02::SRFR" . "SDN:P02::SRFR" . "2007-11-22 11:35:40.0" . . "Parameters relating to the elucidation of geological structure by quantifying the refration of waves from a high energy source by sub-surface layers."@en . "1" . . .