red + book as a fixed title for various official books from the 15th century, especially the Red Book of the Exchequer, a manuscript volume of the 13th century (OED).
"red-book." YourDictionary, n.d. Web. 17 December 2018. <https://www.yourdictionary.com/red-book>.
red-book. (n.d.). Retrieved December 17th, 2018, from https://www.yourdictionary.com/red-book
See Red Book audio and NCSC.
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