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  1. A review of recent attempts to classify birds; an address delivered before the Second international ornithological congress on the 18th of May, 1891, by R. Bowdler Sharpe.
    By: Sharpe, Richard Bowdler, - International Ornithological Congress. Budapest)
    Publication info: Budapest :Pub. at the office of the congress,1891.
    Contributed by: Smithsonian Libraries
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