Educational research :  readings in focus / 
edited by Irvin J. Lehmann, William A. Mehrens. 
 - 2nd ed. 
 - New York ;  London (etc.) :  Holt, Rinehart and Winston,  1979. 
 - xii,433p :  ill. ;  24 cm. 
<br/><br/> Previous ed.: New York : Holt, Rinehart and Winston, 1971. 
<br/><br/><label>ISBN: </label>003043016X 9780030430169 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational research--Addresses, essays, lectures.--United States