Numbering Plan Interworking for the E.164 and X.121 Numbering Plans - Series X: Data Networks and Open System Communication Public Data Networks - Network Aspects RECMN E.166; Study Groups 2 and 7
(WITHDRAWN) Numbering Plan Interworking for the E.164 and X.121 Numbering Plans - Series X: Data Networks and Open System Communication Public Data Networks - Network Aspects Study Groups 2 and 7