Columbia subject headings:
Jordan--Antiquities.
Petra (Extinct city)--Guidebooks.
Petra (Extinct city)--History.
Harvard subject headings:
Jordan--Antiquities.
Petra (Extinct city)--Guidebooks.
Petra (Extinct city)--History.
Princeton subject headings:
Jordan--Antiquities.
Petra (Extinct city)--Guidebooks.
Petra (Extinct city)--History.