RT Chapter SR Electronic(1) YR 1988 T1 Back Matter T2 Telecommunications Traffic, Tariffs and Costs. An Introduction for Managers PB Institution of Engineering and Technology JF Telecommunications SN 9780863411458 DO 10.1049/PBTE019E_bm UL https://digital-library.theiet.org/;jsessionid=5v9aoek3s742i.x-iet-live-01content/books/10.1049/pbte019e_bm