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| 035 | _a(PTEC-PMB)7dd905d591636102 | ||
| 041 | 0 | _aeng | |
| 082 | 4 | _a510 | |
| 100 | 1 | _aVan de Walle John A | |
| 245 | 1 | 0 | _aTeaching student-centered mathematics. Developmentally appropriate instruction for grades 6-8 |
| 653 | _a500 វិទ្យាសាស្ត្រធម្មជាតិ និងគណិតវិទ្យា | ||
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