000 00323nam a2200133Ia 4500
999 _c4582
_d4582
020 _a0471652350
100 _aLeonard Obert
245 _aRock Mechanics and the Design of Structures in Rock
250 _a1
260 _c1967
_bJOHN WILEY AND SONS
_aNew York
300 _axix+650
700 _aWilbur I Duvall
942 _cBK