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  1. The evolution of graded egg marketing in Illinois / by E.E. Broadbent.
    By: Broadbent, Emer Elwood,
    Publication info: Urbana, Ill. :University of Illinois, Agricultural Experiment Station,1957.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Egg trade  Eggs  Grading  Illinois  
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  2. The improvement of the farm egg / by Harry M. Lamon and Charles L. Opperman.
    By: Lamon, Harry M. - Opperman, C. L.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture, Bureau of Animal Industry,1911.
    Contributed by: University of California Libraries (archive.org)
    Subjects: Egg trade  Eggs  Grading  
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