Lehmann, Irvin J, ed. Mehrens, Williams A <br/><br/>
Educational research  readings in focus 

 - New York  Holt, Rinehart and Winston,inc.  1971 
 - xiii, 460 p.; 25cm. 
<br/><br/><label>ISBN: </label>30831407 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Descriptive research<br/>Education - research<br/>Educational research<br/>Experimental research