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| | Encyclopedia Smithsonian: References on the Sirenia |
 | | In D.S. Jordan, The Fur Seals and Fur-Seal Islands of the North Pacific Ocean, Government Printing Office, Washington, DC, l899, Part 3, Art. |
 | | (Only scientific observation of the Steller's Sea Cow prior to extinction. |
 | | Hartman, D.S. l969 "Florida's Manatees, Mermaids in Peril." National Geographic, Vol. |
| www.si.edu /resource/faq/nmnh/sirenia.htm (2919 words) |
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