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Policy implementation and PL 99-457

by James J. Gallagher, Pascal Louis Trohanis, Richard M. Clifford, James J. Gallagher

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Preschool EducationSpecial educationEducation prescolaireEtats-UnisPreschool ChildFru˜hfo˜rderungDisabled PersonsEnseignement prescolaireEducation of Intellectually DisabledSpecial EducationLaw and legislationEducation speciale