The  LOG/LOG manuels were started in 1946.  
Ross R. Middlemiss, Professor of Applied Mathematics,  Washington University, was hired to write them.  
The Log-Log was copyright by W. J. Boos and published in October, 1946.  
Later it was combined into
a Trig-Log/Log manual that became the basis
for  the Acumath Trig Log/Log  manual No. 13.
 That manual, however, was never numbered as #13  
(Pictures courtesy of the Tom Dilatush collection.)

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