TY - BOOK AU - Vignault,Walter L. TI - Worldwide telecommunications guide for the business manager T2 - Wiley series in telecommunications SN - 0471858285 AV - HF5541.T4 U1 - 384/.02465 19 PY - 1987/// CY - New York, Chichester PB - Wiley KW - Business KW - Communication systems KW - Telecommunication systems N1 - Bibliography: p378-382. - Includes index ER -