  1992 - 'hole Numbers' and Other Practical Investigations (Paperback) ISBN-13: 9780521406451 ISBN-10: 0521406455 Genres: Children's Books, Reference, Science & Math ?  1989 - New York Cop and Other Investigations a Resource Book for Mathematics Teachers (Paperback) ISBN-13: 9780521358644 ISBN-10: 0521358647 ? |
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