000 00265nam a2200121Ia 4500
001 120679
008 170722s9999 xx 000 0 und d
100 _aRajam Iyerngar, M. K.
245 _aTunnel engineering /
250 _a2nd ed.
260 _c1957
942 _cGEN
999 _c4011
_d4011