Farrell,Joseph P Heyneman,Stephen P Sepulveda.tuardo,Manuel A <br/><br/>
Textbooks and achievement: What we know / Stephen P.Heyneman, Joseph P.Farrell and Manuel A.Sepulveda -Stuardo 

 - Washington  World Bank  1978 
 - 34p. 
 - World Bank staff working paper .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education<br/>Textbooks