Columbia subject headings:
Leave of absence--Law and legislation--United States.
Leave of absence--United States.
Maternity leave--Law and legislation--United States.
Maternity leave--United States.
Parental leave--Law and legislation--United States.
Parental leave--United States.
Sick leave--Law and legislation--United States.
Sick leave--United States.
Harvard subject headings:
Leave of absence--Law and legislation--United States.
Leave of absence--United States.
Maternity leave--Law and legislation--United States
Maternity leave--United States.
Parental leave--Law and legislation--United States.
Parental leave--Legal status, laws, etc.--United States.
Parental leave--United States--Statistics.
Parental leave--United States.
Sick leave--Law and legislation--United States.
Sick leave--United States.
Princeton subject headings:
Leave of absence--Law and legislation--United States.
Leave of absence--United States.
Maternity leave--Law and legislation--United States.
Maternity leave--United States.
Parental leave--Law and legislation--United States.
Parental leave--United States.
Sick leave--Law and legislation--United States.
Sick leave--United States.