UNESCO source book for science teaching.
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| Corporate Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
[Paris] :
Unesco,
[1962].
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| Edition: | Rev. and enl. [i.e. 2d] ed. |
| Subjects: |
| Physical Description: | 250 p : illus ; 25 cm. |
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