000 003480000a22001450004500
008 140223b1967 xxu||||| |||| 00| 0 eng d
041 _aENG
080 _aH2 K7
082 _aH2 K7
100 _aDuvall (W I)
700 _aObert (L)
245 _aRock mechnics and the design of structure in rock
260 _c1967
650 _aPetrology
999 _c156322
_d156322