000			00333nam a2200133Ia 4500
082			_a629.836 _bBUE
100			_aButeni N V _9107604
245			_aElements of the theory of nonlinear oscillations
260			_aNew York: _bBlaisdell, _c1965.
300			_a226p.
546			_aeng
650			_aSystem engineering _9107605
942			_cBK
999			_c14629 _d14629