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gerald e gruen
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Cilt sonuçları
Early Experience and Human Development
Theodore D. Wachs, Gerald E. Gruen · Springer Science & Business Media
304 sayfa · 2012-12-06
Social Science
Success and Failure as Determinants of Goal-setting Behavior in Mentally Retarded and Normal Children
Gerald E. Gruen, Sheila A. O'Donnell · Yayınevi bilinmiyor
30 sayfa · 1969
Children with mental disabilities