• Hatchwell, B.J., Birkhead, T.R., Goodburn, S.F., Perrins, J.M. & Jones, S.E. (1992) "Chick diets and food intake of nestling Common Guillemots Uria aalge: an inter-colony comparison" Seabird 14:15-20
    [notes]
    http://www.seabirdgroup.org.uk/


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