Zelanator rated The Columbian Exchange: Biological and Cultural Consequences of 1492, 30th Anniversary Edition 30th Edition: 5 stars Jan. 1, 2011 Public Alfred W. Crosby: The Columbian Exchange: Biological and Cultural Consequences of 1492, 30th Anniversary Edition 30th Edition (2003, Praeger)The Columbian Exchange: Biological and Cultural Consequences of 1492, 30th Anniversary Edition 30th Edition by Alfred W. Crosby