Sinyal kereta api: Perbedaan antara revisi
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Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.8 |
Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.8.6 |
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Baris 55:
* [http://www.irse.org/ The Institution of Railway Signal Engineers]
* [http://www.du.edu/~jcalvert/railway/railhom.htm#hist The Origin of the Railway Semaphore]
* [http://myhobbyblogs.com/railfan/2008/01/16/sistem-persinyalan/ Sistem Persinyalan] {{Webarchive|url=https://web.archive.org/web/20080928025512/http://myhobbyblogs.com/railfan/2008/01/16/sistem-persinyalan/ |date=2008-09-28 }}
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