The uncertain search for environmental quality/ 
Bruce A. Ackerman ... [et al.] 
 - London  :  The Free Press ,  1974 
 - x, 386 p.  :  ill.  24 cm. 
<br/><br/><label>ISBN: </label>0029002001 
<br/><br/><label>LCCN: </label>73-021305 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Pollution--Economic aspects--Delaware River