Columbia subject headings:
Admirals--Great Britain--Correspondence.
Great Britain--History, Naval--20th century--Sources.
Keyes, Roger, 1872-1945--Correspondence.
Harvard subject headings:
Great Britain--History, Naval--20th century--Sources.
Keyes, Roger John Brownlow, Sir, Bart, 1872-1945.
Princeton subject headings:
Great Britain--History, Naval--20th century--Sources.
Keyes, Roger, 1872-1945.