@book{9875, year = {c1993.}, publisher = {Princeton University Press,}, note = {Originally published: London ; New York : Hutchinson's University Library, 1954.}, address = {Princeton, N.J. :}, url = {http://www.loc.gov/catdir/description/prin031/92035149.html}, author = {Cain, Arthur J.}, title = {Animal species and their evolution /} }