000 00319nam a2200121Ia 4500
008 200906s9999 xx 000 0 und d
082 _a622.2 I59
100 _aINSTITUION OF MINING AND METALLURGY, LONDON
245 0 _aUNDERGROUND EXCAVATIONS IN ROCK
260 _bI.M.M, LONDON
_c1980
300 _a28X22
942 _cBK
999 _c62472
_d62472