Columbia subject headings:
Grot, N. I︠A︡. (Nikolaĭ I︠A︡kovlevich), 1852-1899.
Harvard subject headings:
Grot, N. I͡A. (Nikolaĭ I͡Akovlevich), 1852-1899.
Princeton subject headings:
Grot, N. I︠A︡. (Nikolaĭ I︠A︡kovlevich), 1852-1899.