An abstract of a committee report and discussion on this subject, before the Railway Signaling Club, Chicago, also an editorial on the same subject. (2400 w.)
Colors for night signals
R R Gaz
1896
Article (Journal)
English
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Colors and forms of traffic signals
Engineering Index Backfile | 1925
Color the night: applying daytime colors to nighttime imagery [5081-18]
British Library Conference Proceedings | 2003
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|Railroad day and night signals
Engineering Index Backfile | 1916
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