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Gelochelidon nilotica (Gmelin & JF 1789)
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n124_w1150
cc-publicdomain
Biodiversity Heritage Library
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Plates to Selby's Illustrations of British ornithology Edinburgh :Archibald Constable & Co. ;[1819]-1834.
biodiversitylibrary.org/page/47276670
n186_w1150
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Biodiversity Heritage Library
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Naturgeschichte der Vögel Mitteleuropas Gera-Untermhaus,F.E. Köhler,1897-1905 [v.1, 1905]
biodiversitylibrary.org/page/35159193
n220_w1150
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Naturgeschichte der Vögel Mitteleuropas Gera-Untermhaus,F.E. Köhler,1897-1905 [v.1, 1905]
biodiversitylibrary.org/page/35159227
n193_w1150
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Biodiversity Heritage Library
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Coloured illustrations of British birds, and their eggs London :G.W. Nickisson,1842-1850.
biodiversitylibrary.org/page/40372108
n331_w1150
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A manual of the birds of Australia London,H.F. & G. Witherby,1921.
biodiversitylibrary.org/page/13966993
n500_w1150
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Johann Andreas Naumann's ... Naturgeschichte der Vögel Deutschlands, nach einigen Erfahrungen entworfen. 13.T.Plates Leipzig :G. Fleischer,1820-1860.
biodiversitylibrary.org/page/33755515
n107_w1150
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The birds of America :. New York :J.B. Chevalier,1840-1844..
biodiversitylibrary.org/page/40419098