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  1. Use of feather minerals as biological tracers to determine the breeding and molting grounds of wild geese / Harold C. Hanson, Robert L. Jones.
    By: Hanson, Harold C. - Jones, Robert L., - Illinois.
    Publication info: Urbana, Ill. :State of Illinois, Dept. of Registration and Education, Natural History Survey Division,1968.
    Contributed by: University of Illinois Urbana Champaign
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