Columbia subject headings:
Harvard subject headings:
Labor and laboring classes--United States.
Labor--United States--History--20th century.
Women--Employment--United States--History--20th century
Women--Employment.
Working class--United States
Working class--United States--History--20th century
World War, 1914-1918--Economic aspects--United States
Princeton subject headings:
Labor--United States.
Women--Employment.
World War, 1914-1918--Economic aspects--United States.