000			003880000a22001570004500
245			_aRock slope engineering
100			_aHoek, Evert
100			_aBray, John
250			_a3rd rev. ed.
260			_aLondon _bInstitute of Mining & Metallurgy _c1981
300			_a358p. : ill., photos., tables
020			_a0900488573
080			_a624.127 _bH6
041			_aEN
942			_cBK
999			_c114397 _d114397