Columbia subject headings:
Harvard subject headings:
Russian Far East (Russia)--Encyclopedias.
Siberia (Russia)--Encyclopedias.
Princeton subject headings:
Encyclopedias.
Natural history--Russia (Federation)--Russian Far East.
Natural history--Russia (Federation)--Siberia.
Russian Far East (Russia)--Encyclopedias.
Siberia (Russia)--Encyclopedias.