Columbia subject headings:
Slavic languages.
Slavic philology.
Trubet︠s︡koĭ, Nikolaĭ Sergeevich, kni︠a︡zʹ, 1890-1938.
Harvard subject headings:
Slavic languages.
Slavic philology.
Trubet︠s︡koĭ, Nikolaĭ Sergeevich, kni︠a︡zʹ, 1890-1938
Princeton subject headings:
Slavic languages.
Slavic philology.