Columbia subject headings:
K. R. (Konstantin Romanov), Grand Duke of Russia, 1858-1915.
Russia--History--1801-1917--Biography.
Harvard subject headings:
K. R. (Konstantin Romanov), Grand Duke of Russia, 1858-1915
Russia--History--1801-1917--Biography.
Princeton subject headings:
K. R. (Konstantin Romanov), Grand Duke of Russia, 1858-1915.
Russia--History--1801-1917.