01265nam--2200385---450-9900006197302033160061973USA010061973(ALEPH)000061973USA01006197320010911d1958----km-y0itay0103----baengUS||||||||001yyContributions to the theory of nonlinear oscillationsby H. Antosiewicz... et al.edited by S. Lefschatz4.PrincetonPrinceton University press1958V, 211 p.graf.26 cmAnnals of Mathematics studies412001Annals of Mathematics studies41Equazioni differenziali nonlineari515.355LEFSCHATZ,SolomonANTOSIEWICZ ,H.ITsalbcISBD990000619730203316510 AMSP 4112673 CBS51000108085BKSCIPATTY9020010911USA011232PATTY9020010911USA011245PATTY9020010911USA01124620020403USA011711PATRY9020040406USA011643Contributions to the theory of nonlinear oscillations60518UNISA