File:1907 Electrical World - Washington D.C. NELA Convention Floor Plan.png
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![File:1907 Electrical World - Washington D.C. NELA Convention Floor Plan.png](https://upload.wikimedia.org/wikipedia/commons/thumb/6/66/1907_Electrical_World_-_Washington_D.C._NELA_Convention_Floor_Plan.png/800px-1907_Electrical_World_-_Washington_D.C._NELA_Convention_Floor_Plan.png?20190623201056)
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