En
RuОмская область
Омская область
Scheme of natural history formations of the western half of Omsk Province.
Spiridonov, Maxim Dmitrievich (1878-1939). Scheme of natural-historical formations of the western half of the Omsk Gubernia [Omsk]: Typo-lithography T-va "Rabochii Put '", 1923.
1923
Омская ГОНБ