Layard, Richard. <br/><br/>
Cost- benefit analysis / 
Richard Layard. 
 - New York :  Penguin,  c1972. 
 - 496 p. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cost effectiveness.
<br/><br/><label>LC Class. No.: </label>HD 47.4  / .L39