000 00673 a2200265 4500
001 7359
020 _a0
041 _aeng
080 _a624.19 Int:72
245 _aInternational symposium on underground openings = Internationales symposium fur untertagbau : proceedings, Lucerne, Sept. 11-14, 1972 / edited by H. Grob and K. Kovari
250 _a
260 _aZurich
260 _b: Swiss Soc. for Soil Mech. & Found. Engg.,
260 _c
300 _a573 p.
300 _c24 cm
490 _a
100 _a
700 _a
650 _a
650 _aUnderground construction-Congresses
650 _aTunneling-Congresses
942 _cBK
942 _2UDC
999 _c8962
_d8962