Columbia subject headings:
Gruppa "Osvobozhdenie truda"--History.
Socialism--Soviet Union--History--19th century.
Harvard subject headings:
Gruppa "Osvobozhdenie truda"--History.
Socialism--Soviet Union--History--19th century.
Princeton subject headings:
Gruppa "Osvobozhdenie truda"--History.
Socialism--Soviet Union--History--19th century.