ISBN 9780821887981 books & textbook
Integers, Fractions and Arithmetic: A Guide for Teachers (MSRI Mathematical Circles Library) (MSRI Mathematical Circles Library, 10)
Judith D. Sally Paul J. Sally Jr.
American Mathematical Society /2012-12-17 Paperback / 208 Pages
isbn-10: 082188798X / isbn-13: 9780821887981
