Oxford Ornithological Society. Report of the Oxford Ornithological Society on the birds of Oxfordshire and Berkshire. Oxford Ornithological Society.
Chicago-referens (17:e uppl.)Oxford Ornithological Society. Report of the Oxford Ornithological Society on the Birds of Oxfordshire and Berkshire. Oxford: Oxford Ornithological Society.
MLA-referens (8:e uppl.)Oxford Ornithological Society. Report of the Oxford Ornithological Society on the Birds of Oxfordshire and Berkshire. Oxford Ornithological Society.
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