Columbia subject headings:
Music theory--Turkey.
Music--Turkey--15th century--History.
Yusuf Kırşehri, active 15th century.
Harvard subject headings:
Music theory--Turkey.
Music--Turkey--15th century--History.
Yusuf Kırşehri, active 15th century.
Princeton subject headings:
Music theory--Turkey.
Music--Turkey--15th century--History.
Yusuf Kırşehri, active 15th century.