000 00304nam a2200121Ia 4500
008 190719s9999 xx 000 0 und d
082 _a622.2 H685
100 _aHOEK,E
245 0 _aROCK SLOPE ENGINEERING
260 _aLONDON
_bINST. OF MINING AND METALLURGY
_c1981
300 _a28X22
942 _cBK
_2DDC
999 _c47268
_d47268