| Incomplete Number Line | |||||||||
| Notice how this book has the number line "5 6 7 8 9 10" printed in it. This is one of the most important clues when determining the value of a book. This particular number line indicates that this is the FIFTH printing of this book because the number line starts with a "5". | |||||||||
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| This book has NO collectible value whatsoever. | |||||||||