Wolters: Die Vogelarten der Erde | |
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Cellular and Molecular Life Sciences 54: 1031—1041, 1998• Cellular and Molecular Life Sciences Vol |
1986 The Atlas of wintering birds in Britain and Ireland.
Identification Guide to European Passerines | ITIS Report: Carduelis carduelis Linnaeus, 1758• Allende: Phylogeography of crossbills, bullfinches, grosbeaks, and rosefinches |
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