00886nam0-22002891i-450-9900025714504033210486612287000257145FED01000257145(Aleph)000257145FED0100025714520000920d1972----km-y0itay50------baENGPerturbation techniques in mathematics, Physics, and EngineeringR. Bellman.New YorkDoubleday1972.viii, 118 p.22 cmMetodi matematici, Metodi matematici per l'ingegneria510Bellman,Richard Ernest<1920-1984>121312ITUNINARICAUNIMARCBK990002571450403321MXV-B-32192MASMASPerturbation Techniques in Mathematics, Physics, and Engineering358315UNINAING01