Norton-Griffiths, M. (1968). The feeding behaviour of the oystercatcher, Haematopus ostralegus.
Chicago-čujuhus (17. p.)Norton-Griffiths, M. The Feeding Behaviour of the Oystercatcher, Haematopus Ostralegus. 1968.
MLA-čujuhus (9. p.)Norton-Griffiths, M. The Feeding Behaviour of the Oystercatcher, Haematopus Ostralegus. 1968.
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