000 00300nam a2200121Ia 4500
999 _c48069
_d48069
008 190711s9999 xx 000 0 und d
082 _a622.2 O125
100 _aObert,L
245 0 _aRock Mechanics and Design of Structures in Rock
260 _aLondon
_bWiley
_c1967
300 _a23X15
942 _cBK