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1936. The birds of Minnesota, ed. 2, vol. 2. 

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1907. The Woodhouse jay in western Colorado. Condor, vol. 9, pp. 81-84. 



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1914. A list of birds from the vicinity of Golden, Colorado. Auk, vol. 31, 

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1935. Notes on some birds of Lower California, Mexico. Condor, vol. 27, 



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1933. Flight maneuvers of the raven. Bird-Lore, vol. 35, pp. 143-145. 

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