TY  - BOOK
AU  - Psacharopoulos, George 
AU  - Velez, Eduardo
AU  - Rojas, Carlos 
TI  - Achievement evaluation of colombia's escuela nueva: is multigrade the answer ? 
U1  - 896 
PY  - 1992///
CY  - Washington
PB  - World Bank
KW  - World Bank Reports
ER  -