TY  - GEN
AU  - Dreyfus, Amos
AU  - Levy, Osnat
TI  - Are the notion of mean and related concepts too difficult for 6th and 7th grade biology students?
KW  - Psicologia e Educacao
KW  - 3500 - Psicologia Educacional
UR  - https://catalogo.ispa.pt/opac/biblioteca/localizacao_doc/r4.htm
ER  -