L.R. Gay <br/><br/>
Educational research:competencies for analysis and application / Gay L.R. - 4th ed. 

 - 4th ed. 
 - Maxwell Macmillan 
<br/><br/><label>ISBN: </label>0029465532 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education-research
<br/><br/><label>Dewey Class. No.: </label>370.78 GAY