Roberts, Helen <br/><br/>
Systematic reviews in the social sciences: a practical guide 

 - 1st 
 - Oxford  Blackwell publishing  2006 
 - xv, 336 p. 
<br/><br/><label>ISBN: </label>1-4051-2110-6 
<br/><br/><label>Subjects--Index Terms: </label>Social sciences - Research - Methodology