Willis, Robert <br/><br/>
Environmental systems engineering and economics   
by Robert Willis and Brad A Finney 
 - Boston  Kluwer academic publishers  2004 
 - xiii, 468p. 
<br/><br/><label>ISBN: </label>140207669X 
<br/><br/><label>Dewey Class. No.: </label>620.8  / P04