Edwin Howard Armstrong (1890 - 1954)

Armstrong's FM Paper
Copyright © 1936 Institute of Electrical and Electronics Engineers. 
Reprinted, with permission, from 'Proceedings of the Institute of Radio Engineers' Volume 24 No. 5, May 1936.  

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Here is Armstrong's classic paper on FM (in PDF format), (55 Pages, 2.1 MBytes)
"A Method of Reducing Disturbances in Radio Signaling by a System of Frequency Modulation"

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