Columbia subject headings:
Telegraphers--Labor unions--United States--History--19th century.
Telegraphers--United States--History--19th century.
Western Union Telegraph Company Strike, 1883.
Harvard subject headings:
Telegraph--United States--Employees--History--19th century.
Telegraphers--Labor unions--United States--History--19th century.
Telegraphers--United States--History--19th century.
Western Union Telegraph Company Strike, 1883.
Princeton subject headings:
Telegraphers--Labor unions--United States--History--19th century.
Telegraphers--United States--History--19th century.
Western Union Telegraph Company Strike, 1883.