Seeds of change :  a quincentennial commemoration / 
Herman Viola ; Carolyn Margolis. 
 - Washington :   Smithsonian Institution,   1991. 
 - 277 p. :   ill. ;  30 cm. 
 - 91(73) (NLA) .
<br/><br/><label>ISBN: </label>1560980362 (paper)  1560980354 (cloth)  
<br/><br/><label>Subjects--Topical Terms: </label><br/>America  --Discovery and exploration.
<br/><br/><label>Universal Decimal Class. No.: </label>91(73) (NLA)