Columbia subject headings:
Harvard subject headings:
Revolutionaries--Russia--Correspondence
Soviet Union--Politics and government--1917-1936.
Statesmen--Soviet Union--Correspondence.
Trotsky, Leon, 1879-1940--Correspondence.
Trotsky, Leon, 1879-1940--Exile--Kazakhstan--Alma-Ata.
Princeton subject headings:
Revolutionaries--Soviet Union--Correspondence.
Soviet Union--Politics and government--1917-1936--Sources.
Trotsky, Leon, 1879-1940--Correspondence.
Trotsky, Leon, 1879-1940--Exile--Kazakhstan--Alma-Ata.