00469    a2200169   4500020001500000082001700015100002200032245005400054250001200108260004400120300002200164440003500186650001600221650001300237650002700250700002200277  a0387004440  a515.353bREN  aRenardy, Michael   aAn Introduction to partial differential equations  a2nd ed.  aNew YorkbSpringer - Verlagc1993g2004  axiv, 435p.c24cm.  aText in applied mathematics 13  aMATHEMATICS  aANALYSIS  aDIFFERENTIAL EQUATIONS  aRogers, Robert C.