Columbia subject headings:
Gavrīil Konstantinovich, Grand Duke of Russia, 1887-1955.
Nobility--Russia--Biography.
Romanov, House of.
Harvard subject headings:
Gavrīil Konstantinovich, Grand Duke of Russia, 1887-1955.
Nobility--Russia--Biography
Romanov, House of.
Princeton subject headings:
Gavrīil Konstantinovich, Grand Duke of Russia, 1887-1955.
Nobility--Russia--Biography.
Romanov, House of.
Russia--History--Nicholas II, 1894-1917.