00269    a2200109   4500020001500000082001800015100001800033245003500051260003900086300001700125650001700142  a085934374x  a621.3692bPEN  aPenfold, R.A.  aPractical fibre-optic projects  aLondonbBernard babanic1995g1995  a134p.c20cm.  aFiber optics