Columbia subject headings:
Sheep--Italy--History.
Sheep--Rome--History.
Wool industry--Italy--History.
Wool industry--Rome--History.
Harvard subject headings:
Sheep--Italy--History.
Sheep--Rome--History.
Wool industry--Italy--History.
Wool industry--Rome--History.
Princeton subject headings:
Sheep--Italy--History.
Sheep--Rome--History.
Wool industry--Italy--History.
Wool industry--Rome--History.