Columbia subject headings:
Biographies.
Personal correspondence.
Princes--Russia--Biography--Sources.
Romanov, House of.
Sergeĭ Aleksandrovich, Grand Duke of Russia, 1857-1905--Correspondence.
Sergeĭ Aleksandrovich, Grand Duke of Russia, 1857-1905.
Harvard subject headings:
Princes--Russia--Biography
Sergeĭ Aleksandrovich, Grand Duke of Russia, 1857-1905.
Princeton subject headings:
Princes--Russia--Biography.
Romanov, House of.
Sergeĭ Aleksandrovich, Grand Duke of Russia, 1857-1905.