Columbia subject headings:
Hours of labor--Soviet Union.
Hours of labor--United States.
Women--Employment--Soviet Union.
Women--Employment--United States.
Harvard subject headings:
Hours of labor--Soviet Union
Hours of labor--United States
Women--Employment--Soviet Union.
Women--Employment--United States.
Princeton subject headings:
Hours of labor--Soviet Union.
Hours of labor--United States.
Women--Employment--Soviet Union.
Women--Employment--United States.