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| Utgitt
| Chichester ; New York : Wiley , c1978
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| Omfang
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| Opplysninger
| Based on a symposium held under the auspices of the third Congress of the International Association for the Scientific Study of Mental Deficiency at The Hague, in the Netherlands, Sept. 4-12, 1973.. - Includes bibliographies and index.
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| Emner
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| ISBN
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