1994 - Changes Over Time Graphs [Investigations in Number, Data, and Space] (Paperback) ISBN-13: 9780866518116 ISBN-10: 0866518118 Genre: Science & Math ? Up and Down the Number Line Changes [Investigations in Number, Data, and Space] (Paperback) ISBN-13: 9780866518048 ISBN-10: 0866518045 Genre: Science & Math ? |