00266nam a2200109 a 450000500170000002000150001708200220003210000190005424500350007326000240010830000240013220251203091511.0  a8185188772  a515.353,bDD, Rau  aRauch, Jeffrey  aPartial differential equations  aDelhibNarosac1992  aviii, 264p., 22 cm.