TY  - BOOK
AU  - Comber,L.G.
AU  - Keeves,John P.
TI  - Science education in nineteen countries : an empirical study / 
U1  - 375.5 COM K  
PY  - 1973///.
CY  - New York : 
PB  - John Wiley and Sons, 
KW  - Science--Study and teaching (Secondary)
KW  - Scientific surveys
ER  -