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horstmann: newbridge gas controllers
Published in: Public Lighting Engineer No. 32, Vol. 9, January-March 1944
Published in: Public Lighting Engineer No. 33, Vol. 9, April-June 1944
Published in: Public Lighting Engineer No. 34, Vol. 9, July-September 1944
Published in: Public Lighting Engineer No. 35, Vol. 9, October-December 1944
Published in: Public Lighting Engineer No. 36, Vol. 10, January-March 1945
Published in: Public Lighting Engineer No. 37, Vol. 10, April-June 1945
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