The Subspecies of the Mountain Chickadee, by Joseph
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   � [Subtitle: Vol. 17, No. 17, pp. 505-515]
   � [Link: [1]http://www.gutenberg.org/3/3/5/3/33531 ]
   � [Files: 33531.txt; 33531-8.txt; 33531-h.htm]
   Thanks to Tom Cosmas, Larry B. Harrison and the Online
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   Many thanks
   Janet

References

   1. http://www.gutenberg.org/3/3/5/3/33531
   2. http://www.pgdp.net/