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_223 _a372.72 _bTHP 1954 |
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_aThyne, James M _9203651 |
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_aPatterns of error in the addition number facts / _cBy James M Thyne |
| 260 |
_aLondon : _bUniversity of London Press, _cc1954 |
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| 300 |
_axx, 275 p. ; _c23 cm. |
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| 650 | 0 |
_aArithmetic _xStudy and teaching. _9203653 |
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| 830 |
_aPublications of the Scottish Council for Research in Education, _v37 _9203654 |
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_c68706 _d68706 |
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