Integrated science in the junior secondary school in Sri Lanka.
| 主要作者: | |
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| 企业作者: | , |
| 格式: | 图书 |
| 语言: | 英语 |
| 出版: |
Paris
Unesco Press
c1976.
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| 丛编: | Experiments and innovations in education : Asian series
no.27 |
| 主题: |