00525cam a2200157ua 4500041001000000082002100010100002200031245008700053260005200140300001200192504000500204700002100209942000700230999001900237952011100256  aengh  a621.3845bHAR/PR  aHarbottle, H.R  .  aPrinciples of telecommunications engineering / cH.R.Harbottle.hTextual Documents  aLondon : bEnglish Universities Press , c1962.  a373 ; .  a1 aHamman, G.L.B  .  cBK  c338099d338099  01104070aKAUAETbKAUAETd2012-04-07l0o621.3845pKAU_KCAEFT-3759 r2025-09-03 00:00:00w2025-09-03yBK