The Handbook of research synthesis / 
editores, Harris Cooper and Larry V. Hedges. 
 - New York :  Russell Sage Foundation,  1994. 
 - xvi, 573 p. :  il. 
<br/><br/><label>ISBN: </label>0-871-54-226-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Investigación --Métodos estadisticos.
<br/><br/><label>Dewey Class. No.: </label>001.42  / H233