Sushkin, P. P. (1925). Spisok i raspredelenie ptit͡s Russkogo Altai͡a i blizhaĭshikh chasteĭ Severo-Zapadnoĭ Mongolii: S opisaniem novykh ili maloizvestnykh form = List and distribution of birds of the Russian Altai and nearest parts of NW Mongolia : with a description of new or imperfectly known forms. Leningrad: Izd-vo Akademii nauk SSSR.
Chicago Style CitationSushkin, Petr Petrovich. Spisok I Raspredelenie Ptit͡s Russkogo Altai͡a I Blizhaĭshikh Chasteĭ Severo-Zapadnoĭ Mongolii: S Opisaniem Novykh Ili Maloizvestnykh Form = List and Distribution of Birds of the Russian Altai and Nearest Parts of NW Mongolia : With a Description of New or Imperfectly Known Forms. Leningrad: Izd-vo Akademii nauk SSSR, 1925.
MLA CitationSushkin, Petr Petrovich. Spisok I Raspredelenie Ptit͡s Russkogo Altai͡a I Blizhaĭshikh Chasteĭ Severo-Zapadnoĭ Mongolii: S Opisaniem Novykh Ili Maloizvestnykh Form = List and Distribution of Birds of the Russian Altai and Nearest Parts of NW Mongolia : With a Description of New or Imperfectly Known Forms. Leningrad: Izd-vo Akademii nauk SSSR, 1925.