Cooper, Harris <br/><br/>
Research synthesis and meta-analysis : a step-by-step approach / 
Harris Cooper 
 - 4th ed. 
 -  Sage Publications  2010 
<br/><br/>20129 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences - Research
<br/><br/><label>LC Class. No.: </label>H62  / Coo