Children's understanding of mathematics : 11-16=11- 16 / ed. K. M. Hart... [et al.]

Children's understanding of mathematics : 11-16=11- 16 / ed. K. M. Hart... [et al.] . - London : John Murray, imp. 1987 . - 231 p. 24 cm
0-7195-3772-X (Brochado)

51:372.851
372.851:51