00680nam0-22002771i-450-99000056292040332120001010000056292FED01000056292(Aleph)000056292FED0100005629220001010d--------km-y0itay50------baitay-------001yyBoundary value problemsDavid L. Powers4.ed.San DiegoHAP199924 cm528 p.Powers,David L.ITUNINARICAUNIMARCBK99000056292040332105 76 22083DININDININUNINAING01