- https://www.nytimes.com/games/wordle/index.html - Where it all began, the NY Times daily wordle.
- Webster's Unabridged Dictionary 2009 Edition. The basis of my work to get all of the 5 letter words I can.
- https://www.gutenberg.org/ebooks/29765 - The Gutenberg Project website is where I obtained a copy of Webster's Unabridged Dictionary.