Columbia subject headings:
Communism--Hungary--Abstracts.
Hungary--History--20th century--Abstracts.
Hungary--History--Revolution, 1918-1919--Abstracts.
Working class--Hungary--Abstracts.
Harvard subject headings:
Communism--Hungary--Abstracts.
Hungary--History--20th century--Abstracts.
Hungary--History--Revolution, 1918-1919--Abstracts.
Labor--Hungary--Abstracts.
Princeton subject headings: