Columbia subject headings:
Harvard subject headings:
Employee rights--United States--Cases.
Employee rights--United States--Periodicals.
Labor contract--United States--Cases.
Labor contract--United States--Periodicals.
Labor laws and legislation--United States--Cases
Labor laws and legislation--United States--Periodicals
Princeton subject headings:
Employee rights--United States--Cases.
Labor contract--United States--Cases.
Labor laws and legislation--United States--Cases.