Cohen, Saul B. <br/><br/>
Geography and the American environment. 

 - vii, 304 p.  21cm. 
<br/><br/> Includes references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Historical Geography- United States
<br/><br/><label>Dewey Class. No.: </label>910 C66 1967