The acquisition of concepts of light and sound in the intermediate grades /
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| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
Ann Arbor, Mich. :
University Microfilms International,
[200-?]
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| Subjects: |
| Physical Description: | xiii, 262 leaves ; 21 cm. |
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| Bibliography: | Includes bibliographical references (leaves 254-262) |