000 00294nam a2200121Ia 4500
001 00527
008 190706s9999 xx 000 0 und d
082 _a622.206 I61
100 _aBALDEMA,A.A
245 0 _aINTERNATIONAL CONGRESS ON ROCK MECHANICS
260 _bROTTERDAM
_c1983
942 _cREF
_2DDC
999 _c9467
_d9467