Twins and twin relations / by Helen L. Koch.
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| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
Chicago :
University of Chicago Press,
[1966]
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| Physical Description: | xvi, 302 pages ; 25 cm. |
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| Bibliography: | Includes bibliographical references (pages 281-292) and index. |
| ISBN: | 0226449335 9780226449333 |