En
RuPrugavin. On the necessity and means of studying of the Russian schism.
Prugavin. On the necessity and means of studying of the Russian schism.
News of the imperial Russian geographical society.1881 T. 17
News of the imperial Russian geographical society.St. Petersburg: B. and., 1890.1881 T. 17. 1887.
1887
Русское географическое общество