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McGraw-Hill
> Gerald A. Ashton
Gerald A. Ashton
title
ISBN-13
(ISBN-10)
year of publication
Essentials of Intellectual Retardation
978-O-O7-O93411-5
(O-O7-O93411-8)
1977
A.A.
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G. A.
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G.A.A.
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G. Ashton
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Gerald A.
Gerald A. Beathard