| Ref. No. | Description | |
|---|---|---|
| 1394 | Jefferson, T.A., S. Leatherwood and M.A. Webber 1993 FAO species Identification Guide: Marine Mammals of the World. Rome, FAO. 320 p. + 587 figures. | 1993 |
| 1522 | Rice, D.W. 1998 Marine Mammals of the World Systematics and Distribution. Special Publication number 4: The Society for Marine Mammalogy. 231p. | 1998 |
| 128831 | Fergusson, R.A. 2010 Nile crocodile Crocodylus niloticus. pp. 84-89 In Manolis, S.C.; Stevenson, C. (eds) Crocodiles. Status Survey and Conservation Action Plan, 3rd edn. Crocodile Specialist Group, Darwin. | 2010 |