00643nam a2200217Ia 450000500170000000800460001703700100006304000080007304000080008104000080008904100080009704100080010508400080011310000290012124500820015026000090023285600620024194200100030399900210031395200910033420260320201343.0008  262003s9999    xx            000 0 eng d  aEBOOK  aCRL  beng  cCRL  2eng  aeng  qCRL  aHenry-Labordere91133872 0aVirtual Roaming Systems for GSM, GPRS and UMTS: Open Connectivity in Practice  bIEEE  uhttps://ieeexplore.ieee.org/servlet/opac?bknumber=8040089  cEBOOK  c1720748d1720748  00104070aCRLbCRLd2026-03-20l0pCL2124842r2026-03-20 20:13:43w2026-03-20yEBOOK