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For further information on the blue whale see:
- Carwardine, M, Hoyt, E, Fordyce, R.E., and Gill, P. (1998) Whales and Dolphins. Harper Collins Publishers, London.
- The Whale and Dolphin Conservation Society (WDCS):
http://www.wdcs.org/
For the most current estimates of whale populations see the International Whaling Commission:
http://www.iwcoffice.org/conservation/estimate.htm