Columbia subject headings:
Harvard subject headings:
Difference (Psychology)--Longitudinal studies.
Differentiation (Sociology)
Discrimination--Longitudinal studies.
Families--Longitudinal studies.
Political science--Longitudinal studies.
Social change--Longitudinal studies.
Work--Longitudinal studies.
Working class--Longitudinal studies.
Princeton subject headings:
Difference (Psychology)--Longitudinal studies.
Discrimination--Longitudinal studies.
Families--Longitudinal studies.
Labor--Longitudinal studies.
Political science--Longitudinal studies.
Social change--Longitudinal studies.