00389nam a2200121Ia 4500008004100000082002000041100002100061245004500082260003800127300001900165440004600184500003700230260811b        |||||||| |||| 00| 0 eng d  a515.35bT812.LP  aTreves, Francois  aLinear partial differential equationsb/  aNew York:bGordon & Breach,c1970  ax, 120p. Bibl.  aNotes on Mathematics and its applications  a"International student edition".