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The effect of lamp spacing and power on the legibility of electric signs

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1. https://ir.uiowa.edu/etd/5180
2. https://ir.uiowa.edu/cgi/viewcontent.cgi?article=6092&context=etd

Identifer	oai:union.ndltd.org:uiowa.edu/oai:ir.uiowa.edu:etd-6092
Date	01 January 1913
Creators	Edwards, John Harvey
Publisher	University of Iowa
Source Sets	University of Iowa
Language	English
Detected Language	English
Type	thesis
Format	application/pdf
Source	Theses and Dissertations
Rights	Material in the public domain. No restrictions on use., http://creativecommons.org/publicdomain/mark/1.0/