Columbia subject headings:
Phlegraean Plain (Italy)--Description and travel.
Phlegraean Plain (Italy)--History.
Phlegraean Plain (Italy)--In art.
Harvard subject headings:
Names, Geographical--Italy--Phlegraean Plain.
Phlegraean Plain (Italy)--History.
Phlegraean Plain (Italy)--In art.
Smith, John, 1749-1831.
Princeton subject headings:
Names, Geographical--Italy--Phlegraean Plain.
Phlegraean Plain (Italy)--History.
Phlegraean Plain (Italy)--In art.