Internet telephony - Prices

[NT 60487] Overview

[NT 60478] Works:	1 [NT 60520] works in 1 [NT 60521] publications in 1 [NT 60522] languages

[NT 60480] Titles

Charging for mobile all-IP telecommunications [NT 59711] by: Lin, Yi-Bing (1961-); Sou, Sok-Ian ([NT 8598] Electronic resources)