000 00274nam a2200121Ia 4500
008 220201s1997 xx 000 0 eng d
082 _a620
_bCHO
100 _aChopra, A.K.
245 0 _aDynamics of structures
260 _aDelhi
_bPHI
_c1997
300 _a704
942 _2ddc
999 _c35594
_d35594