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|a QA135.5
|b .H42
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|a Heddens, James W.
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| 245 |
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|a Todays mathematics :
|b concepts and methods in elementary school mathematics /
|c James W. Heddens.
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| 250 |
|
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|a 4th ed.
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| 260 |
|
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|a Chicago :
|b S.R.A,
|c c1979.
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| 300 |
|
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|a 590 p :
|b Ill.
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| 500 |
|
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|a Includes index.
|
| 650 |
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0 |
|a Mathematics
|x study and teaching[elementary]
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| 908 |
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|d 2017-09-28
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|o OS QA135.5.H42 1979
|p BK041890
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