Willson, V L <br/><br/>
The variance accounted for in meta-analysis of psychotherapy outcomes.  [electronic resource] 

 -  The American psychologist  May 1980 
 - 467 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0003-066X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humans<br/>Mental Disorders--therapy<br/>Outcome and Process Assessment, Health Care<br/>Psychotherapy