International study of achievement in mathematics : a comparison of twelve countries - Husén, Torsten (Stockholm : Almqvist & Wiksell ; New York : Wiley, 1967)
At head of title: International Project for the Evaluation of Educational Achievement (IEA) Phase I.
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Keywords: Mathematical ability; Matematiksel yetenek; Mathematics -- Study and teaching (Secondary).; Matematik -- Çalışması ve öğretilmesi; Comparative education; Karşılaştırmalı eğitim