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  1. Izvestiia na Tsarskitia prirodonauchni instituti v Sofiia = Mitteilungen aus den Konigl. naturwissenschaftlichen Instituten in Sofia, Bulgarien = Bulletin des Institutions royales d'histoire naturelle á Sofia, Bulgarie.
    By: Tsarskitie prirodonauchni instituti (Sofiia, Bulgaria)
    Publication info: Sofiia :Pechatnitsa P. Glushkov,1928-
    Contributed by: Smithsonian Libraries
    BHL Collections: Smithsonian Institution Libraries
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