Crosby,Alfred,W <br/><br/>
The Columbian exchange :   biological and cultural cousequences of 1492 

 - Westport:  Green Wood Press,  1972. 
 - xv,268p.   :ill.  22cm. 
 - Contributions in American studies No 2 .
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0-8371-5821-4 
<br/><br/><label>Subjects--Topical Terms: </label>