Mohr, Lawrence B. <br/><br/>
Impact analysis for program evaluation 
Lawrence B. Mohr 
 - Newbury Park  Sage Publications  1992 
 - xviii,217p.  ill.  23cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0803949812 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Policy sciences<br/>Evaluation research (Social action programs)
<br/><br/><label>LC Class. No.: </label>SOC H97.M66