01120nam a2200289 i 450099100132204970753620020507114427.0960308s1964 us ||| | eng b10204465-39ule_instLE00645835ExLDip.to Fisicaita510(021)510.35510.49Goursat, Edouard335028Variation of solutions, partial differential equations of the second order /E. Goursat ; transl. by Howard G. BergmannNew York :Dover, Inc.,1964329 p. ;20 cm.A course in mathematical analysis ;3 (Part 1)Differential equations, PartialBergmann, Howard G..b1020446508-07-1527-06-02991001322049707536LE006 510(021) GOUV. 3 (Part 1)12006000018241le006-E0.00-l- 00000.i1025254x27-06-02Variation of solutions, partial differential equations of the second order192245UNISALENTOle00601-01-96ma -engus 01