000 00222nam a2200085 4500
080 _a624.127
_bHOE.77
245 _aRock Slope engineering. Ed - 2
100 _aHoek, Evert
260 _aLondon
_bInstitution of mining and Metallurgy,
_c1977
300 _a402p
999 _c29676
_d29676