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Evaluating the effect of coaching on SAT scores: A meta- an..:

Der Simonian, Rebecca ; Laird, Nan M
Harvard educational review.  53 (1983)  1 - p. 1-15 , 1983
Exemplar:  Zentrale:E03 z pae 001 jc/118; Zentrale:Magazin Zs fb 7118