TY  - GEN
AU  - Nesher, Pearla
AU  - Sukenik, Michal
TI  - Effect of formal representation on the learning of ratio concepts
KW  - Psicologia e Educacao
KW  - 3500 - Psicologia Educacional
UR  - https://catalogo.ispa.pt/opac/biblioteca/localizacao_doc/r4.htm
ER  -