[1]
К. Ю. Мосолова, Є. В. Зав’ялов, and В. Г. Табачишин, “Ornithological studies by I.B.Volchanetskiy in the northern part of Lower Volga Region (to the 120th birth anniversary)”, TJOVNKKNUSB, vol. 25, pp. 121-123, 1.