Perloff, Robert, ed. <br/><br/>
Evaluator interventions  pros and cons 

 - Beverly hills  Sage publications, inc.  1979 
 - 120 p.; 22cm. 
 - Sage research progress series in evaluation .
<br/><br/><label>ISBN: </label>803911763 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evaluation methods<br/>Evaluation research<br/>Evaluation techniques<br/>Program evaluation