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| 245 | 0 | _aReport of the international clearinghouse on science and mathematics curricular developments 1966 | |
| 245 | 0 | _cMaryland (University of ) | |
| 260 | _c1966 | ||
| 300 | _axvi, 291p. | ||
| 546 | _aA joint project of the American association for the advancement of science and the science teaching Center | ||
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