References
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CARTER, M., CLARKE, R. & DAVIES, J. Submission No 797: Slaty-backed Gull Larus schistisagus Cooktown, QLD. 14th February 2008 to 4th April 2008. [Available online at: http://birdlife.org.au/documents/barc/SUMM797.htm. Accessed 17 February 2016].
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