Columbia subject headings:
Harvard subject headings:
Autonomy--Congresses.
Industrial relations--Congresses
Precarious employment--Congresses.
Professions--Sociological aspects--Congresses.
Social structure--Congresses.
Princeton subject headings:
Autonomy--Congresses.
Industrial relations--Congresses.
Precarious employment--Congresses.
Professions--Sociological aspects--Congresses.
Social structure--Congresses.