International summit on prevention of mental retardation from biomedical causes : December 15-16, 1977, Wingspread / edit. Jean Koch. -- Washington : U.S. Department of Health, Education and Welfare, 1979. -- xv, 198 s.

1. postihnutie intelektuálne - etiológia - prevencia a kontrola - kongresy

I. Koch, Jean

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