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  1. Adventure--travel--exploration.
    By: Unger, Frederic William,
    Publication info: Philadelphia,The John C. Winston co.,c1909
    Contributed by: Library of Congress
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  2. Adventure--travel--exploration.
    By: Unger, Frederic William,
    Publication info: Philadelphia, Pa.,G. A. Parker[c1909]
    Contributed by: Library of Congress
    View Book