The Mental Calculator's Handbook
Full Title: | The Mental Calculator's Handbook |
---|---|
ISBN: | 1300846658 |
ISBN13: | 9781300846659 |
Authors: |
Robert Fountain Jan van Koningsveld |
Full Title: | The Mental Calculator's Handbook |
---|---|
ISBN: | 1300846658 |
ISBN13: | 9781300846659 |
Authors: |
Robert Fountain Jan van Koningsveld |