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  1. By: Pol︠i︡akov, G. I. (Grigoriĭ Izrailevich) - Velizhanin, A. P.
    Publication info: Moskva :Ornitologicheskii viestnik,1915.
    Holding Institution: Smithsonian Libraries
  2. By: Pol︠i︡akov, G. I. (Grigoriĭ Izrailevich)
    Publication info: Moskva :G.I. Pol︠i︡akov,1910-
    Holding Institution: Smithsonian Libraries