Use of opposition concept and outerdirectedness in intellectually-average, familial retarded, and organically retarded children

Balla, D.; Styfco, S.J.; Zigler, E.

American Journal of Mental Deficiency 75(6): 663-680

1971


ISSN/ISBN: 0002-9351
PMID: 5581990
Document Number: 37087

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