Pfafflin James R Ed. <br/><br/>
Encyclopedia of environmental science and engineering.2V. 

 - 3 
 - Switzerland  Gordon and Breach Science Publishers     1992 
<br/><br/><label>Standard No.: </label>38697 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Dewey Class. No.: </label>G:55k, N2.1-.2       RR