Columbia subject headings:
Soviet Union--History--Revolution, 1917-1921.
Harvard subject headings:
Crosley, Pauline Stewart--Correspondence.
Crosley, Walter Selwyn, 1871-1967--Correspondence.
Diplomats' spouses--United States--Correspondence.
Diplomats--United States--Correspondence.
Military attachés--United States--Correspondence.
Soviet Union--Foreign relations--United States--Sources.
Soviet Union--History--Revolution, 1917-1921--Sources.
Soviet Union--History--Revolution, 1917-1921.
United States--Foreign relations--Soviet Union--Sources.
Princeton subject headings:
Soviet Union--History--Revolution, 1917-1921.