Columbia subject headings:
Fet, A. A. (Afanasiĭ Afanasʹevich), 1820-1892.
Harvard subject headings:
Fet, A. A. (Afanasiĭ Afanasʹevich), 1820-1892.
Princeton subject headings:
Fet, A. A. (Afanasiĭ Afanasʹevich), 1820-1892.