000 00249nam a2200097Ia 4500
008 160710s1987 xx 000 0 und d
245 _aINTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING
260 _bPERGAMON
_c1987
300 _a127
942 _2ddc
_cD
999 _c70627
_d70627