TY  - BOOK
AU  - Farrell,Joseph P
AU  - Heyneman,Stephen P
AU  - Sepulveda.tuardo,Manuel A
ED  -  World Bank
TI  - Textbooks and achievement: What we know / Stephen P.Heyneman, Joseph P.Farrell and Manuel A.Sepulveda -Stuardo
CY  - Washington
KW  - Education
KW  - Textbooks
ER  -