Marine Mammals of the World
Author: T.A. Jefferson, S. Leatherwood and M.A. Webber
 Kingdom Animalia
 Phylum Chordata
 Class Mammalia
 Order Carnivora
 Order Cetacea
 Order Sirenia
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General introduction, overview of the species treated and functionality of the site
A tree, picture gallery and alphabetical lists provide access to the species and higher groups
Descriptions of species
Descriptions of higher groups
Identification keys
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Concise explanation of the BIS program
Authors of and contributors to this project
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