au.\*:("VAN DE KOPPEL JMH")
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EDUCATIONAL FAMILY BACKGROUND AS A DETERMINANT OF SCHOOL RESULTS OF ZAIROIS PUPILSVAN DE KOPPEL JMH.1975; NEDERL. T. PSYCHOL.; NEDERL.; DA. 1975; VOL. 30; NO 1; PP. 85-91; BIBL. 13REF.Article
