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  1. Some Japanese Aphididae
    By: Essig, E O - Kuwana, Shinkai Inokichi.
    Type: Article
    In: Proceedings of the California Academy of Sciences
    Volume: 8
    Series: 4
    Date: 1918
    Page Range: 35--112
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  2. Some new and noteworthy Aphidae from western and southern South America (Hemiptera-Homoptera)
    By: Essig, E O
    Type: Article
    In: Proc. Calif. Acad. Sci., San Francisco
    Volume: 28
    Date: 1953
    Page Range: 59--164
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