00328nam a2200121Ia 4500082002000000245005600020260002500076700000500101490004600106500000500152100002100157300002800178  a515.35bC725.AT  aAnalytic theory of Partial differential equationsb  aBostonbPitmanc1980  a  aMonographs and studies in Mathematicsv 8  a  aColton, David L.  axii, 239p. Index, Bibl.