000 00663cab a2200241 4500
001 X2720
008 090401t1995 xxu||||| |||| 00| 0 eng d
035 _a(Sirsi) u25933
041 _aeng
100 _aSalisbury, R.
245 _aSeismic surveys to detect shallow gas
260 _c1995
350 _a0
490 _aSurveying World
_v4(1) November 1995, 43-46(3)
520 _aOutlines the seismic surveying techniques which have been developed to investigate shallow gas.
650 _aDRILLING
650 _aHYDROPHONES
650 _aSEISMIC SURVEYS
650 _aSHALLOW GAS
690 _aLAND SURVEYING
942 _n0
948 _c04/03/1997
999 _c17420
_d17420