00849nam0-22002891i-450-990003107860403321000310786FED01000310786(Aleph)000310786FED0100031078620000920d1952----km-y0itay50------baENGIT<<An >>introduction to the theory of differential equationsWalter Leighton.1st ed..New YorkMcGraw-Hill1952.174 p.illus.24 cmInternational series in pure and applied mathematicsLeighton,WalterITUNINARICAUNIMARCBK990003107860403321B/3.0 LEI03665SESSESIntroduction to the theory of differential equations462488UNINAING01