Automatic and semi-automatic signals used on London Underground; reference to collision at Hammersmith on June 10 1932.
Safety on tube railways
Engineer
Engineer ; 154 , n 3999
1932
Article (Journal)
English
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Engineering Index Backfile | 1902
Engineering Index Backfile | 1902
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|Engineering Index Backfile | 1924
|Engineering Index Backfile | 1923
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