000 00298nam a2200133 4500
001 0000003815
008 121121 eng
040 _aJMG HQ
090 0 0 _a552
_bSYM
245 0 0 _aSymposium on rock as construction materials
260 _c1982
300 _a1 v. (various pagings)
_c30 cm
650 0 _aRocks
999 _c20333
_d20333