General Reference Material:

References from the Text:

Fiesenheiser, E. I. 1951. The Versalog Slide Rule: An Instruction Manual. 1st ed. Chicago: The Fredrick Post Co.
Hopp, Peter M. 1999. Slide Rules: Their History, Models, and Makers. Mendham, NJ: Astragal Press.
K & e Slide Rules: Deci-Lon, an Instruction Manual. 1962. Morristown, NJ: Keuffel & Esser Co.
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Xie, Yihui. 2016. Bookdown: Authoring Books and Technical Documents with r Markdown.