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1914. Some winter birds of Oklahoma. Auk, vol. 31, pp. 473-^93. 

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1870. Geological survey of California. Ornithology, vol. 1. Land birds. 



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1938. Nesting of an eastern kingbird in a deserted oriole nest. Condor, 

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 CoTTAM, Clabence, and Hanson, Haeold Caesten. 



1938. Food habits of some Arctic birds and mammals. Field Mus. Nat. 



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1939. Food of some uncommon North American birds. Auk, vol. 56, pp. 



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1878. Birds of the Colorado Valley. U. S. Geol. Surv. Terr. Misc. Publ. 11. 

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1926. The twilight song of the wood pewee : A preliminary statement. Auk, 



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1933. The music of the wood pewee's song and one of its laws. Auk, vol. 



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1927. Bird parasites of the nematode suborders Strongylata, Ascaridata, and 



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1917. Horned larlvs at Aweme, Manitoba. Ottawa Nat., vol. 30, pp. 144-148. 

 Daniel, John Warwick, Jr. 



1902. Summer birds of the Great Dismal Swamp. Auk, vol. 19, pp. 15-18. 

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1937. Observations on nesting barn swallows. Bird-Banding, vol. 8, pp. 



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 Dawson, William Leon. 



1923. The birds of California. Vols. 1 and 2. 

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1909. The birds of Washington. 

 Dearborn, Ned. 



1903. The birds of Durham and vicinity, New Hampshire. 

 Deck, Raymond S. 



1934. Feathered philosophers. Bird-Lore, vol. 36, pp. 226-231. 

 Dice, Lee Raymond. 



1918. The birds of Walla Walla and Columbia Counties, southeastern Wash- 



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1938. The birds of El Salvador. Field Mus. Nat. Hist., zool. ser., vol. 23. 

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1920. Nesting of the olive-sided flycatcher in Berkeley, California. Condor, 

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1888. Birds of West Virginia. West Virginia Agr. Exp. Stat. Bull. 3. 



