000 00231nam a2200097Ia 4500
008 230401s9999 xx 000 0 eng d
100 _aAMBEKAR(A.G)
245 0 _aMECHANICAL VIbrations & NEW ENG.
260 _bPHI
942 _2ddc
_cBTECH
999 _c7238
_d7238