00281pam a2200121 a 4500020000500000041000500005082000800010100002800018245004900046250000900095260004300104300001200147  c  h  a5.1  aRYDER (John D )eauthor  aNetworks, lines and fieldshTextual Document  a2nd   bPrentice Hall of India New Delhic1997  axi, 593