000 00289nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a622.15 S275
100 _aSAZHINA,N
245 0 _aGRAVITY PROSPECTING
260 _aMOSCOW
_bMIR Publishers
_c1971
300 _a22X15
942 _cBK
_2DDC
999 _c16765
_d16765