TY  - BOOK
AU  - Comber, L. C.
AU  - Keeves, John P.
TI  - Science education in nineteen countries
T2  - International studies in evaluation
U1  - 507 
PY  - 1973///
CY  - New York
PB  - Wiley
KW  - Ciencia
KW  - Estudio y enseñanza
ER  -