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by Kazdin, Alan E.
by Wolfelt, Alan D
by Francesco De Pascalis; Alan Brener
by Hustak, Alan
by Williams, Alan
by Brinkley, Alan
by Alan E. Mussett , M. Aftab Khan , Illustrated by Sue Button
by Black, David Alan; Merkle, Benjamin L.
by Tussy, Alan; Koenig, Diane
by Gross, Robert A.; Taylor, Alan M.; Gross, Robert A.