Cunningham, William P. <br/><br/>
North America / 
William P. Cunningham 
 - 3 nd ed. 
 - London :  Wm. C. Brown Pub,  1995 
 - 612 p. :  ill 
<br/><br/><label>ISBN: </label>0697158944 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental science.
<br/><br/><label>LC Class. No.: </label>GF51  / C8