International study of achivement in mathematics ; a comparison of twelve countries
HUSEN, Torsten
International study of achivement in mathematics ; a comparison of twelve countries - N.Y. 1967 - 2v. - International project for the evaluation of educational achi .
MATHEMATICS
MATHEMATICS
510 H95I
International study of achivement in mathematics ; a comparison of twelve countries - N.Y. 1967 - 2v. - International project for the evaluation of educational achi .
MATHEMATICS
MATHEMATICS
510 H95I