Columbia subject headings:
Advertising, Newspaper--Mexico--Mexico City--History--20th century.
Advertising--Drugs--Mexico--Mexico City--History--20th century.
Mexican newspapers.
País (Mexico City)
Tonics (Medicinal preparations)--Mexico--Mexico City--History--20th century.
Harvard subject headings:
Advertising, Newspaper--Mexico--Mexico City--History--20th century.
Advertising--Drugs--Mexico--Mexico City--History--20th century.
Mexican newspapers.
País (Mexico City)
Tonics (Medicinal preparations)--Mexico--Mexico City--History--20th century.
Princeton subject headings:
Advertising, Newspaper--Mexico--Mexico City--History--20th century.
Advertising--Drugs--Mexico--Mexico City--History--20th century.
Mexican newspapers.
País (Mexico City)
Tonics (Medicinal preparations)--Mexico--Mexico City--History--20th century.