edited by Research Institute of Telecommunications and Economics, Compiled under the supervision of Finance Department, Minister's Secretariat, Ministry of Posts and TelecommunicationsThe Institute1998<DK321-A34>
国立国会図書館
[edited by Posts and Telecommunications International Japan]Posts and Telecommunications International1997<DK321-A30>
国立国会図書館
[edited by Posts and Telecommunications International]Posts and Telecommunications International1995<DK321-A26>
国立国会図書館
[edited by Posts and Telecommunications International]Posts and Telecommunications International1994<DK321-A25>
国立国会図書館
[edited by Posts and Telecommunications International, Japan]Posts and Telecommunications International, Japan1993<DK321-A20>
国立国会図書館
[compiled under the supervision of Finance Department, Minister's Secretariat, Ministry of Posts and Telecommunications]Posts and Telecommunications International, Japan1993<DK321-A17>
国立国会図書館
Planning Division, Finance Dept., Minister's Secretariat, Ministry of Posts and Telecommunications[2000]<DK321-A41>
国立国会図書館