TY  - BOOK
AU  - Lapointe, Archie E.,
AU  - Mead, Nancy A.
AU  - Phillips,Gary W.
TI  - A world of differences: An international assemen of mathematics and science 
SN  - 0886850886
AV  - QA11 L36
PY  - 1989///
CY  - New jersey
PB  - Educational testing services
KW  - Ciencia
KW  - Estudio y enseñanza (Secundaria)
KW  - Matemáticas
ER  -