00960nam a2200289 i 450099100113510970753620020507111743.0970308s1977 de ||| | eng 3519122138b10178600-39ule_instLE00642744ExLDip.to Fisicaita510.35515.35QA371Hellwig, Günter40782Partial differential equations :an introduction /Günter Hellwig2nd ed.Stuttgart :B.G. Teubner,1977xi, 259 p. ;23 cm.Differential equations, partial.b1017860002-04-1427-06-02991001135109707536LE006 510.35 HEL12006000022019le006-E0.00-l- 01010.i1021914627-06-02Partial differential equations189147UNISALENTOle00601-01-97ma -engde 01