Slide Rule Manuals
       
 (???) The Handbook of the Slide Rule (Bayley, 1876)                  
 (???) The Use of the Slide Rule (Cullimore, 1920)                    
 (???) The Versalog Slide Rule Instruction Manual (Fiesenheiser, 1951)
 (DIR) The Slide Rule - A Complete Manual (Slater, 1967)