TY - BOOK AU - Betz,Herman AU - Ewing,George McNaught TI - Differential equations with applications T2 - Harper'smathematics series U1 - 517.3807 PY - 1964/// CY - New York, N.Y. PB - Harper & Row KW - ECUACIONES DIFERENCIALES N1 - Incluye biblioggrafĂ­a ER -