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  1. Building Illinois' biological memory : a framework for long-term ecosystem monitoring / [Ben Barber, Dana Curtiss, Daniel Niven]
    By: Barber, Ben. - Curtiss, Dana. - Niven, Daniel Kenneth, - Illinois.
    Publication info: Springfield, Ill. :Illinois Dept. of Natural Resources, Energy and Environmental Assessment Division,2000.
    Contributed by: University of Illinois Urbana Champaign
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