Columbia subject headings:
Music--Azerbaijan--History and criticism.
Harvard subject headings:
Composers--Azerbaijan--Biography.
Composers--Azerbaijan--Correspondence.
Composers--Azerbaijan--Diaries.
Magomai̐ev, Mu̇slu̇m, 1885-1937.
Music--Azerbaijan--History and criticism.
Operas--Librettos
Princeton subject headings:
Music--Azerbaijan--History and criticism.