TY  - GEN
AU  - Maciver, Douglas
AU  - Stipek, Deborah
AU  - Daniels, Denise
TI  - Explaining within-semester changes in student effort in junior high school and senior high school courses
KW  - Psicologia e Educacao
KW  - 3500 - Psicologia Educacional
UR  - https://catalogo.ispa.pt/opac/biblioteca/localizacao_doc/r4.htm
ER  -