00406nam a2200133 a 450000500170000002000150001708200160003210000230004824500580007126000650012930000240019449000320021870000220025020251203110913.0  a0070616094  a515.35bSIM  aSimmons, George F.  aDifferential equationsbtheory, tehnique and practice  aNew DelhibTata McGraw - Hill Publishing company Ltd.,c2007  ax, 534p.c24 cm. PB  awalter rudin student series  aKrantz, steven G.