Columbia subject headings:
Harvard subject headings:
Foreign workers--Case studies--Congresses.
Regional economics--Case studies--Congresses.
Repatriation--Case studies--Congresses.
Return migration--Case studies--Congresses.
Princeton subject headings:
Foreign workers--Case studies--Congresses.
Regional economics--Case studies--Congresses.
Repatriation--Case studies--Congresses.
Return migration--Case studies--Congresses.