Shaeffer, Sheldon F. <br/><br/>
A framework for collaborating for educational change / 
Sheldon Shaeffer. 
 - París :  IIEP,  1991. 
 - 34 p. 
 - Increasing and improving the quality of basic education ;  3 .
<br/><br/><label>Encabezamiento--Tema: </label><br/>Innovaciones educativas