000			003780000a22001690004500
245			_aRock slope engineering
100			_aHoek, Evert
100			_aBray, John
250			_a3d rev. ed.
260			_aLondon _bE & FN Spon _c1981
300			_a358 p., ill.
020			_a0-419-16010-8
080			_a624.127 _bH6
650			_aROCK MECHANICS
041			_aEN
942			_cBK
999			_c64531 _d64531