Columbia subject headings:
Harvard subject headings:
Aerospace industry--Employees--Labor unions--Washington (State)
Aircraft industry--Washington (State)--Employees.
International Association of Machinists and Aerospace Workers. Aeronautical Industrial District Lodge 751.--History.
International Association of Machinists and Aerospace Workers. Aerospace Industrial District Lodge 751.--History.
Machinists--Labor unions--Washington (State)--History.
Machinists--Washington (State)
Princeton subject headings:
International Association of Machinists and Aerospace Workers. Aerospace Industrial District Lodge 751--History.