Lewis, Gary <br/><br/>
Data analysis for educational planning / 
Gary Lewis ; colab. Noel McGinn, Ernesto Schiefelbein. 
 - Cambridge, E.U.A. :  Harvard Graduate School of Education, Center for Studies in Education and Development,  1980. 
 - 217 p. :  il. 
<br/><br/><label>Encabezamiento--Tema: </label><br/>Educación--Planificación<br/>Educación--Estadística