Columbia subject headings:
Harvard subject headings:
Azerbaijan (Iran)--History--20th century.
Bāqir Khān, 1861 or 1862-1916.
Iran--History--20th century.
Princeton subject headings:
Azerbaijan (Iran)--History--20 century.
Bāqir Khān, 1861 or 2-1916.
Iran--History--20th century.