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  1. De l'espèce et de la classification en zoologie /
    By: Agassiz, Louis,
    Edition: Éd. rev. et augm. /
    Publication info: Paris :G. Baillière,1869.
    Contributed by: Gerstein - University of Toronto (archive.org)
    Subjects: Classification  Species  Zoology  
    BHL Collections: Charles Darwin's Library
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  2. Harmful non-indigenous species in the U.S. : hearings before the Committee on Governmental Affairs, United States Senate, One Hundred Third Congress, second session, March 11 and 15, 1994.
    By: United States.
    Publication info: Washington :For sale by the U.S. G.P.O., Supt. of Docs., Congressional Sales Office,1994.
    Contributed by: Boston Public Library (archive.org)
    Subjects: Agricultural pests  Control  Economic aspects  Government policy  Species  United States  
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  3. Is species a natural or artificial division in nature? a paper read before the Biological Section of the Hamilton Association, December 7th, 1888 /
    By: Moffat, J. Alston. - Hamilton Association.
    Publication info: Hamilton, Ont.? :s.n.,1888?
    Contributed by: Canadiana.org (archive.org)
    Subjects: Species  Variation  Zoology  
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  4. The species problem; a symposium presented at the Atlanta meeting of the American Association for the Advancement of Science, December 28-29, 1955. Edited by Ernst Mayr.
    By: American Association for the Advancement of Science. - Mayr, Ernst,
    Publication info: Washington,1957.
    Contributed by: MBLWHOI Library, Woods Hole
    Subjects: Congresses  Species  
    BHL Collections: MBLWHOI Library, Woods Hole
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