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new manufacturers installations collection restorations timeline identification publications glossary mailing list site map links about contact	british commercial gas association: british commercial gas association Published in: Public Lighting Engineer No. 25, Vol. 7, April-June 1942 Published in: Public Lighting Engineer No. 26, Vol. 7, July-September 1942 Published in: Public Lighting Engineer No. 27, Vol. 7, October-December 1942