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| Attachment | Size |
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| A new subspecies of Redbilled Hornbill Tockus erythrorhynchus_1964.pdf | 342.4 KB |
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| Subspeciation in the Black Tit Parus niger Vieillot.pdf | 945.78 KB |
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| Racial variation in Bennetts Woodpecker Campethera bennettii.pdf | 652.44 KB |
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| New subspecies of the Greater Sparrow Passer iagoensis.pdf | 375.78 KB |
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| The geographical races of the Yellow-throated Sparrow Petronia superciliaris.pdf | 537.11 KB |
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| Geographical variation in the Go-away Bird Corythaixoides concolor.pdf | 347.69 KB |
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| On the South African races of the Long_billed Pipit Anthus sumilis Jerdon.pdf | 482.8 KB |
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| Notes on variation in the South African populations of the Yellow_billed Hornbill Tockus flavirostris.pdf | 465.86 KB |