Biggs, J. B.
Mathematics and the conditions of learnin a study of arithematic in the primary school - England: Wales, 1967. - xi, 441p.
HBK
Eng
Mathematics-Study and teaching
510.7 / BIM
Mathematics and the conditions of learnin a study of arithematic in the primary school - England: Wales, 1967. - xi, 441p.
HBK
Eng
Mathematics-Study and teaching
510.7 / BIM