Columbia subject headings:
Mexican-American Border Region--History--Pictorial works.
Mexican-American Border Region--History.
Phytogeography--Mexican-American Border Region--History--Pictorial works.
Phytogeography--Mexican-American Border Region--History.
Plant ecology--Mexican-American Border Region--History--Pictorial works.
Plant ecology--Mexican-American Border Region--History.
Vegetation dynamics--Mexican-American Border Region--History--Pictorial works.
Vegetation dynamics--Mexican-American Border Region--History.
Harvard subject headings:
Mexican-American Border Region--History--Pictorial works.
Mexican-American Border Region--History.
Phytogeography--Mexican-American Border Region--History--Pictorial works.
Phytogeography--Mexican-American Border Region--History.
Plant ecology--Mexican-American Border Region--History--Pictorial works.
Plant ecology--Mexican-American Border Region--History.
Vegetation dynamics--Mexican-American Border Region--History--Pictorial works.
Vegetation dynamics--Mexican-American Border Region--History.
Princeton subject headings:
Botany--Mexican-American Border Region--Ecology--History--Pictorial works.
Botany--Mexican-American Border Region--Ecology--History.
Mexican-American Border Region--History--Pictorial works.
Mexican-American Border Region--History.
Phytogeography--Mexican-American Border Region--History--Pictorial works.
Phytogeography--Mexican-American Border Region--History.
Vegetation dynamics--Mexican-American Border Region--History--Pictorial works.
Vegetation dynamics--Mexican-American Border Region--History.