International Telecommunication Union (ITU),
Directives concerning the protection of telecommunication lines against harmful effects from electric power and electrified railway lines: 1-44
International Telecommunication Union (ITU),
Directives concerning the protection of telecommunication lines against harmful effects from electric power and electrified railway lines: 1-84, ISBN 978-92-61-04091-8
International Telecommunication Union (ITU),
Directives concerning the protection of telecommunication lines against harmful effects from electric power and electrified railway lines, VI: 1-64, ISBN 978-92-61-04071-0
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