Columbia subject headings:
Malaria--Spain--Valencia--History--Sources.
Public health--Spain--Valencia--History--Sources.
Rice--Spain--Valencia (Region)--History--Sources.
Harvard subject headings:
Malaria--Spain--Valencia (City)--History--Sources.
Malaria--Spain--Valencia--History--Sources.
Public health--Spain--Valencia (City)--History--Sources.
Public health--Spain--Valencia--History--Sources.
Rice--Spain--Valencia (Region)--History--Sources.
Princeton subject headings:
Malaria--Spain--Valencia (City)--History--Sources.
Public health--Spain--Valencia (City)--History--Sources.
Rice--Spain--Valencia (Region)--History--Sources.