Columbia subject headings:
Harvard subject headings:
Epidemics--Portugal--Porto--Press coverage--History.
Epidemics--Portugal--Press coverage--History.
Porto (Portugal)--In mass media--History.
Public health--Portugal--Porto--Press coverage--History.
Public health--Portugal--Press coverage--History.
Princeton subject headings:
Epidemics--Portugal--Press coverage--History--19th century.
Epidemics--Portugal--Press coverage--History--20th century.
Public health--Portugal--History--19th century.
Public health--Portugal--History--20th century.