Columbia subject headings:
Polonskiĭ, I︠A︡. P. (I︠A︡kov Petrovich), 1819-1898.
Harvard subject headings:
Polonskiĭ, I︠A︡. P. (I︠A︡kov Petrovich), 1819-1898.
Princeton subject headings:
Polonskiĭ, I︠A︡. P. (I︠A︡kov Petrovich), 1819-1898.