Columbia subject headings:
Nicholas II, Emperor of Russia, 1868-1918--Family--Sources.
Pretenders to the throne--Russia--Biography--Sources.
Romanov, House of--Sources.
Harvard subject headings:
Nicholas II, Emperor of Russia, 1868-1918--Family--Sources.
Nicholas II, Emperor of Russia, 1868-1918--Family.
Pretenders to the throne--Russia--Biography--Sources.
Pretenders to the throne--Russia.
Romanov, House of--Sources.
Romanov, House of.
Princeton subject headings:
Nicholas II, Emperor of Russia, 1868-1918--Family--Sources.
Pretenders to the throne--Russia--Sources.
Romanov, House of--Sources.