- KATA Amatir RADIO DAY 18 April
- HF propagasi
- Tanda panggilan data base
- APRS
- IARU QSL Biro
- ARRL
- Monitoring System
- Sociaties IARU R3 Anggota
- Communcation Bencana
- IARU R-3 Penghargaan
DXER
- OC-242 DXpedition-iref
- DX News Letter 1333 March 20, 2003
- CQ WPX SSB Operasi Diumumkan: 2003
- 425 DX News #619 16 Ìàðòà 2003 Edited by I1JQJ &IK1ADH
- http://ja.aprs.fi/browse/2/YBhttp://ri.search.yahoo.com-
- CQ WPX SSB Announced OperationsMarch 29-30, 2003
- HamSphere
- HAM CALL NET
- OPDX 602 10 Maret 2003
- www.af4z.com