Columbia subject headings:
Igorʹ Svi︠a︡toslavich, novgorod-severskiĭ kni︠a︡zʹ, 1151?-1202--Romances.
Harvard subject headings:
Princeton subject headings:
Igorʹ Svi︠a︡toslavich, novgorod-severskiĭ kni︠a︡zʹ, 1151?-1202--Romances.