00341nam a2200109Ia 4500008004100000020001500041082002000056100002300076245007900099260003300178300002000211240222b        |||||||| |||| 00| 0 eng d  a0471040894  a515.35bG982.IP  aGustafson, Karl E.  aIntroduction to partial differential equations and hilbert space methods /  aNew York:bJohn Wiley,c1980  axv, 270p. Index