Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Muchaschawria, A. L. 1958. Zum Studium von schadlichen Insekten an P. pithiusa. Akad. d. Landw. Wiss. der GSSR. I, N 1, Thbilissi (Georgisch).
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