TY  - BOOK
AU  - Hart, Kathleen
TI  - Children's understanding of mathematics
PY  - 1981///
CY  - London
PB  - John Murray
KW  - Psicologia Educacional
KW  - 3500 - Psicologia Educacional
UR  - https://catalogo.ispa.pt/opac/biblioteca/localizacao_doc/e2.htm
ER  -