 Subtraction UnpluggedMinuends to 18 by Sara Jordan, Sara Jordan Publishing, et all June, 2001
 The Search for Mathematical Roots, 18701940 by Ivor GrattanGuinness, 15 January, 2001
 A Course in Arithmetic by Jean Pierre Serre, April, 1985
 Math Magic : Human Calculator Shows How to Master Everyday Math Problems in Seconds, The by Scott Flansburg, June, 1994
 The Devil's Arithmetic by Jane Yolen, October, 1990
 Painless Fractions (Barron's Painless Series) by Alyece Cummings, Laurie Hamilton, September, 1998
 The Best Of Times by Greg Tang, Harry Briggs, September, 2002
 Zero: The Biography of a Dangerous Idea by Charles Seife, Matt Zimet, 05 September, 2000
 Dosage Calculations Made Incredibly Easy (Made Incredible Easy) by Springhouse Corporation, Springhouse, June, 2001
 Error Patterns in Computation: Using Error Patterns to Improve Instruction (8th Edition) by Robert B. Ashlock, 26 April, 2001
