Claude E. Shannon

From MANY-VALUED LOGIC, 1969 by Nicholas Rescher

Great importance attaches to the use of many-valued logics for the formal analysis of electronic circuitry and in switching theory. Here the pioneering work is Claude E. Shannon's paper of 1938.⁶⁷   (etc)

⁶⁷ See [Shannon, Claude E. (1938) "A Symbolic Analysis of Relay' and Switching Circuits."]   A part of Shannon's ideas regarding the analysis of electrical circuitry by means of Boolean algebra was developed independently in V. I. Shestakov's 1938 doctoral dissertation for the University of Moscow.

pages 16 (and 301).