Weisbrod, B A <br/><br/>
Rewarding performance that is hard to measure: the private nonprofit sector.  [electronic resource] 

 -  Science (New York, N.Y.)  May 1989 
 - 541-6 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0036-8075 
<br/><br/><label>Standard No.: </label>10.1126/science.244.4904.541  doi