Columbia subject headings:
Asparukh, Khan of Bulgaria, approximately 644-approximately 700--Songs and music.
Choruses, Secular (Mixed voices) with orchestra.
Symphonies.
Harvard subject headings:
Princeton subject headings:
Asparukh, Khan of Bulgaria, approximately 644-approximately 700--Songs and music.
Choruses, Secular (Mixed voices) with orchestra.
Symphonies.