Columbia subject headings:
Harvard subject headings:
Akademii︠a︡ nauk SSSR. Biblioteka--Exhibitions.
Manuscripts, Bulgarian--Exhibitions.
Manuscripts, Church Slavic--Exhibitions.
Manuscripts, Russian--Exhibitions.
Narodna biblioteka "Kiril i Metodiĭ"--Exhibitions.
Princeton subject headings:
Akademii︠a︡ nauk SSSR. Biblioteka--Exhibitions.
Manuscripts, Bulgarian--Exhibitions.
Manuscripts, Church Slavic--Exhibitions.
Manuscripts, Russian--Exhibitions.
Narodna biblioteka "Kiril i Metodiĭ"--Exhibitions.