Comparison with results of decade ago shows remarkable increase in efficiency of lighting units.
Notes on recent car lighting tests
Ry. Elec. Engr.
Railway Electrical Engineer ; 17 , n 1
1926
5 pages
14 Figs.
Article (Journal)
English
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Engineering Index Backfile | 1902
|IEEE | 1926
DESIGN NOTES: On public lighting
British Library Online Contents | 2008
|Engineering Index Backfile | 1928
|Engineering Index Backfile | 1928
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