000 003020000a22001090004500
008 151023t1979 xxu||||| |||| 00| 0 eng d
041 _aeng
080 _a624.121
_bI6
942 _cBK
245 _aFourth international congress on rock mechanics : proceedings of...
260 _aRotterdam
_bBalkema
_c1979
999 _c142067
_d142067