000 00358nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a622.206 I59
100 _aINSTITUTION OF ENGINEERS
245 0 _aPROCEEDINGS OF THE SIXTH NATIONAL SYMPOSIUM ON ROCK MECHANICS
260 _aK.G.F.
_bINSTITUE OF ROCK MECHANICS
_c1992
300 _a25X18
942 _cBK
_2DDC
999 _c23267
_d23267