Columbia subject headings:
Slavic literature--To 1800--History and criticism.
Slovo o polku Igoreve--Sources.
Slovo o polku Igoreve.
Harvard subject headings:
Slovo o polku Igoreve--Authorship.
Princeton subject headings:
Petr Borislavich, approximately 1120-approximately 1196.
Slovo o polku Igoreve--Authorship.