Crosby, Alfred W. <br/><br/>
Columbian exchange :  Biological and cultural consequences of 1492 

 - 30th anniversary ed. 
 - London :  Praeger,  2003. 
 - xxvii, 283p. 
<br/><br/><label>ISBN: </label>9780275980924 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reference