Columbia subject headings:
Night work--United States.
Shift systems--United States.
Women employees--United States.
World War, 1939-1945--Women--United States.
Harvard subject headings:
Night work--United States.
Shift systems--United States.
Women employees--United States.
World War, 1939-1945--War work--United States.
World War, 1939-1945--Women--United States.
Princeton subject headings: