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7Annie W:. Ward & Mildred Murray-Ward. (1999):Assesment in the Classroom/Belmont, CA: Wadsworth Pub.
8Gelfer et al. : Portfolios: focus on young children. /Teaching Exceptional Children Vol. 31 No. 2 (Nov. /Dec. 1998 )
9Grace & Cathy(1992): The Portfolio and Its Use:Developmentally Appropriate Assessment of Young Children/ERIC Clearinghouse on Elementary and Earl), Childhood Education.