Columbia subject headings:
Harvard subject headings:
Agriculture and state--Mexico--Congresses.
Agriculture--Economic aspects--Mexico--Congresses
Mexico--Rural conditions--Congresses.
Mexico--Rural conditions.
Peasants--Mexico
Peasants--Mexico--Congresses.
Rural development--Mexico--Congresses.
Princeton subject headings:
Agriculture and state--Mexico--Congresses.
Mexico--Rural conditions--Congresses.
Peasants--Mexico--Congresses.
Rural development--Mexico--Congresses.