  2007 - The Psychology of Number and Its Applications to Methods of Teaching Arithmetic (Hardcover) → Paperback, Hardcover ISBN-13: 9780548197141 ISBN-10: 0548197148 ?  2007 - The Psychology of Number and Its Applications to Methods of Teaching Arithmetic (Paperback) → Paperback, Hardcover ISBN-13: 9781432504854 ISBN-10: 1432504851 ? |
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