En
RuA. G. Protopopov. The Journey to Central Altai.
A. G. Protopopov. The Journey to Central Altai.
News of the West Siberian Department of the Imperial Russian Geographical Society.1913. T. 1. Vol.one
News of the West Siberian Department of the Imperial Russian Geographical Society.Omsk: B. and., 1914.1913. T. 1. Vol.1. 1913.
1913
Русское Географическое Общество