Columbia subject headings:
Education, Higher--Mexico--Poza Rica de Hidalgo--History--Pictorial works.
Education, Higher--Mexico--Tuxpan de Rodríguez Cano--History--Pictorial works.
Universidad Veracruzana--History--Pictorial works.
Harvard subject headings:
Education, Higher--Mexico--Poza Rica de Hidalgo Region--History.
Education, Higher--Mexico--Tuxpan de Rodríguez Cano Region--History.
Universidad Veracruzana--History.
Princeton subject headings: