Columbia subject headings:
Environmental management--Mexico--Nuevo León (State)--History.
Environmental policy--Mexico--History.
Environmental policy--Mexico--Nuevo León (State)--History.
Nuevo León (Mexico : State)--Environmental conditions--History.
Sustainability--Mexico--History.
Sustainability--Mexico--Nuevo León (State)--History.
Harvard subject headings:
Princeton subject headings:
Mexico--Environmental conditions.
Nuevo León (Mexico : State)--Environmental conditions.
Sustainability--Mexico--Nuevo León (State)--History.