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  1. Revised phylogeny and functional interpretation of the Edrioasteroidea based on new taxa from the Early and Middle Ordovician of western Utah / Thomas E. Guensburg --, James Sprinkle --.
    By: Guensburg, Thomas Edgar. - Sprinkle, James, - Field Museum of Natural History.
    Publication info: Chicago, Ill. :Field Museum of Natural History,1994.
    Contributed by: University of Illinois Urbana Champaign
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