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| 082 | _aT:(X:75).1(X).N7, L7 | ||
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| 245 | 0 | _aCost factors in planning educational technology system | |
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_aParis _bUnesco _c1977 |
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_a62p. _ccm. |
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| 500 | _aFundamentals of educational planning. 24.; International Institute for Educational Planning | ||
| 650 | _a Education | ||
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