Columbia subject headings:
Economic development--Congresses.
Social change--Congresses.
Sustainable development--Congresses.
Wages--Congresses.
Work environment--Congresses.
Harvard subject headings:
Economic development--Congresses
Social change--Congresses
Sustainable development--Congresses
Wages--Congresses.
Work environment--Congresses.
Princeton subject headings:
Economic development--Congresses.
Social change--Congresses.
Sustainable development--Congresses.
Wages--Congresses.
Work environment--Congresses.