Columbia subject headings:
Paleobotany--Congresses.
Plant remains (Archaeology)--Congresses.
Pompeii (Extinct city)
Harvard subject headings:
Paleobotany--Congresses.
Plant remains (Archaeology)--Congresses.
Pompeii (Extinct city)
Princeton subject headings:
Botany--Italy--Pompeii (Extinct city)--Congresses.
Pompeii (Extinct city)--Congresses.