Columbia subject headings:
Agriculture and state--Mexico--Congresses.
Agriculture and state--United States--Congresses.
Agriculture--Economic aspects--Mexico--Congresses.
Agriculture--Economic aspects--United States--Congresses.
Mexico--Commerce--United States--Congresses.
Rural development--Mexico--Congresses.
Rural development--United States--Congresses.
United States--Commerce--Mexico--Congresses.
Harvard subject headings:
Agriculture and state--Mexico--Congresses.
Agriculture and state--United States--Congresses.
Agriculture--Economic aspects--Mexico--Congresses.
Agriculture--Economic aspects--United States--Congresses.
Mexico--Commerce--United States--Congresses.
Rural development--Mexico--Congresses.
Rural development--United States--Congresses
United States--Commerce--Mexico--Congresses.
Princeton subject headings:
Agriculture and state--Mexico--Congresses.
Agriculture and state--United States--Congresses.
Agriculture--Economic aspects--Mexico--Congresses.
Agriculture--Economic aspects--United States--Congresses.
Mexico--Commerce--United States--Congresses.
Rural development--Mexico--Congresses.
Rural development--United States--Congresses.
United States--Commerce--Mexico--Congresses.