http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
xxxvii, 334 pages : illustrations, maps ; 23 cm.
by Ernst Mayr ; with an introduction by Niles Eldredge.
Reprint. Originally published: New York : Columbia University Press, 1942. (Columbia biological series ; number 13) With new introduction and bibliography.