Columbia subject headings:
City planning--Israel--Negev--Congresses.
Cooperation--Israel--Congresses.
Cooperation--Spain--Mondragón--Congresses.
Harvard subject headings:
Collective settlements--Spain--Mondragón--Congresses.
Kibbutzim--Congresses
Princeton subject headings:
Collective settlements--Israel--Congresses.
Collective settlements--Spain--Mondragón--Congresses.