The manual of tariff innovation : for telephony services / ed. Chorleywood Consulting
Interconnect : a global guide to effective telecommunications / David Lewin, Richard Kee
Cutting the cost : the falling price of telecoms in Europe / Graham Louth, Federico Ciccione
The manual of interconnect billing / ed. Chorleywood Consulting Ltd.
National leased circuits : carrier tariffs, discount policies and service levels 1997 / Josie Sephton and Gwyn Evans