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ScLATER, William Lutley, and Mackworth-Praed, Cyril Winthrop 



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1933. Taxonomic and field notes on some birds of north-eastern Tanganyika 

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Serle, William 



1940. Field observations on some Northern Nigerian birds, II. Ibis, ser. 

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1951. On the nesting of the red-headed dioch. Oologists Record, vol. 25, 



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Ibis, vol. 99, pp. 628-685. 



Sharpe, Richard Bowdler 



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Shelley, George Ernest 



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1923. Whydahs. Avicultural Mag., ser. 4, vol. 1, No. 5, pp. 108-118. 



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Simpson, George Gatlord 



1944. Tempo and mode in evolution. New York, Columbia Univ. Press, 



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Skead, C. J. 



1947 A study of the Cape weaver. Ostrich, vol. 18, pp. 1-42. 

 1953. A study of the spectacled weaver (Ploceus ocularius Smith). Ostrich, 

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1956. A study of the red bishop bird. Ostrich, vol. 27, pp. 112-125. 



1957. Parasitism of the common waxbill, Estrilda astrild, by the pin-tailed 



widow-bird. Vidua macroura. Ostrich, vol. 28, pp. 214-216. 



Skinner, Kenneth L. 



1923a. Some scarce finch eggs. Oologists' Record, vol. 3, pp. 22-23. 

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Smithers, Reat H. N., Irwin, M. P. Stuart, and Paterson, Mary L. 

 1957. A check list of the birds of Southern Rhodesia, Cambridge, Univ. 

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