Columbia subject headings:
Borodin, Aleksandr Porfirʹevich, 1833-1887. Kni︠a︡zʹ Igorʹ.
Harvard subject headings:
Borodin, Aleksandr Porfirʹevich, 1833-1887. Kni︠a︡zʹ Igorʹ.
Princeton subject headings:
Borodin, Aleksandr Porfirʹevich, 1833-1887. Kni︠a︡zʹ Igorʹ.