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  1. The literature of arthropods associated with alfalfa: I. A bibliography of the spotted alfalfa aphid, Therioaphis maculata (Buckton) (Homoptera: Aphidae) / D. W. Davis, M. P. Nichols, E. J. Armbrust.
    By: Davis, D. W. - Armbrust, E J - Nichols, M P
    Publication info: Urbana :Illinois Dept. of Registration and Education, Natural History Survey Division,1974.
    Contributed by: University of Illinois Urbana Champaign
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