Columbia subject headings:
Harvard subject headings:
Geographers--Soviet Union--Biography
Semenov-Ti︠a︡nʹ-Shanskiĭ, Petr, 1827-1914
Princeton subject headings:
Geographers--Soviet Union.
Semenov-Ti︠a︡nʹ-Shanskiĭ, Petr, 1827-1914.