000 00427nam a2200169Ia 4500
001 16539
008 170722s9999 xx 000 0 und d
245 _aContributions to the theory of nonlinear oscillations. 5v ed by S Lefschtz /
260 _c1950.
490 _aAnnals of mathematics studies
500 _a4
653 _aMathematics
653 _aMechanics
653 _aSolid
653 _aVibration
942 _cGEN
999 _c57900
_d57900