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| Attachment | Size |
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| The characters and range of Pogoniulus chrysoconus extoni.pdf | 1.33 MB |
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| Subspeciation in Trachyphonus vaillantii Ranzan.pdf | 785.64 KB |
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| Further on the races of the Masked Weaver Ploceus velatus Vieillot.pdf | 263.08 KB |
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| The Hartlaubii subspecies.pdf | 99.11 KB |
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| The characters and range of Uraeginthus angolensis natalensis Zedlitz 1911.pdf | 393.94 KB |
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| Seasonal movement and variation in the southern poplulations_Dusky lark.pdf | 2.1 MB |
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| Subspeciation in some birds from Rhodesia_Part II.pdf | 613.96 KB |
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| Variation in Falco dickinsoni.pdf | 1.59 MB |