TY - BOOK T1 - Contributions to the theory of nonlinear oscillations. T2 - Annals of Mathematics studies. A1 - Lefschetz, Solomon LA - English PP - Princeton PB - Priceton University Press YR - 1950 UL - https://catalogo.bibliotecas.unlp.edu.ar/Record/dfi.9926 OP - 350 NO - En dos volúmenes KW - VIBRACIONES KW - ACUSTICA KW - VIBRACIONES MECANICAS KW - OSCILACIONES ER -