01040nam a2200277 i 450099100078853970753620020507173613.0950503s1958 us ||| | eng b10757442-39ule_instLE01302341ExLDip.to Matematicaeng531.322AMS 70KAntosiewicz, H. A.535028Contributions to the theory of nonlinear oscillations /H. Antosiewicz ... [et al.] ; edited by S. LefschetzPrinceton :Princeton Univ. Press,1958v. ;24 cm.Annals of mathematics studies ;41Nonlinear motionsLefschetz, Solomon.b1075744223-02-1728-06-02991000788539707536LE013 70K LEF11 (1958)12013000028064le013-E0.00-l- 00000.i1085193828-06-02Contributions to the theory of nonlinear oscillations923003UNISALENTOle01301-01-95ma -engus 01