[Syrphidae] Stackelberg 1952

[Gerard Pennards]

Dear All,
Can someone share the following publication with me as a PDF? I would be very grateful for that!
Thanks in advance, kind regards,
Gerard

Stackelberg, A.A. 1952. Novye Syrphidae (Diptera) palearkticheskoy fauny. Trudy Zool. Inst. Leningrad. 12: 350-400.
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