00313    a2200109   4500020001500000082001800015100002000033245005800053260004100111300002400152650002700176  a8120308824  a621.3827bSEN  aSenior, John M.  aOptical fiber communications bprinciples and pratice  aNew DelhibPrentice hallc1992g1992  axxxiii, 927p.c23cm  aOPTICAL COMMUNICATIONS