00335nam a2200121Ia 4500082001800000100000700018245007700025260003500102300002100137490004500158500000500203700000500208  a517bAm514.NM  ad  aNumerical methods for partial differential equationsbcAmes, William F.  aNew YorkbAcademic Pressc1977  axiv, 365p. Index  aComputer Science and Applied Mathematics  a  a