- The History of Counting by Denise Schmandt-Besserat, Michael Hays, August, 1999
- Counting on Frank by Rod Clement, December, 1991
- The Key of It All: An Encyclopedic Guide to the Sacred Languages & Magickal Systems of the World: Book One: The Eastern Mysteries (Llewellyn's Sou) by David Allen Hulse, December, 1993
- Number Words and Number Symbols: A Cultural History of Numbers by Karl Menninger, Paul Broneer, May, 1992
- Big Numbers by Edward Packard, March, 2000
- The Nashville Number System by Chas Williams, Williams Chas, 11 April, 2001
- From One to Zero: A Universal History of Numbers by Georges Ifrah, February, 1987
- Euler Systems by Karl Rubin, 01 May, 2000
- Mathematical Thinking at Grade 5: Introduction & Landmarks in the Number System (Investigations in Number, Data, and Space Series) by Marlene Kliman, Cornelia Tierney, et all May, 1997
- Discrete Dynamical Systems: Theory and Applications by James T. Sandefur, November, 1990
|