Columbia subject headings:
Anarchism--United States.
Haymarket Square Riot, Chicago, Ill., 1886.
Working class--United States--History.
Harvard subject headings:
Anarchism--United States.
Haymarket Square Riot, Chicago, Ill., 1886.
Labor movement--United States--History
Princeton subject headings:
Anarchism--United States.
Haymarket Square Riot, Chicago, Ill., 1886.
Labor movement--United States--History.