%0 Journal Article %T The Columbian Exchange: Biological and Cultural Consequences of 1492. By Alfred W. Crosby, Jr. (Westport: Greenwood, 1972. xv + 268 pp. Maps, illustrations, tables, notes, bibliography, and index. $9.50.) %A Dunn, Richard, S. %J Journal of American History %V 60 %N 2 %P 420-422 %@ 0021-8723 %D 1973-09-01 %I Oxford University Press %~ DeepDyve