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  1. Behavior of the lower organisms.
    By: Jennings, Herbert Spencer,
    Publication info: New York,Columbia Univ. Press,1906.
    Contributed by: Gerstein - University of Toronto (archive.org)
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  2. Contributions to the study of the behaviour of lower organisms.
    By: Jennings, Herbert Spencer,
    Publication info: Washington,Carnegie Inst. of Washington,1904.
    Contributed by: Gerstein - University of Toronto (archive.org)
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  3. Life and death, heredity and evolution in unicellular organisms.
    By: Jennings, Herbert Spencer,
    Publication info: Boston,Badger[1920]
    Contributed by: Gerstein - University of Toronto (archive.org)
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