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Subject
- Labor unions--United States.[remove]2
- Politics and culture--United States--History--20th century.[remove]2
- Strikes and lockouts--California--San Francisco.2
- Ambulances.1
- Barricades (Military science)1
- Merriam, Frank Finley, 1865-1955.1
- Police patrol.1
- Rossi, Angelo J. (Angelo Joseph), 1878-1948.1
- Speeches, addresses, etc., American.1
- Tear gas.1
- United States. National Guard Bureau.1