Johnstone, James N. <br/><br/>
Indicators of the performance of educational systems /  by James N. Johnstone. 

 - Paris :  UNESCO :  IIEP,  1976. 
 - 58 p. 
 - IIEP occasional paper ;  41 .
<br/><br/><label>Encabezamiento--Tema: </label><br/>Educación--Estadística