Columbia subject headings:
Harvard subject headings:
Europe--Guidebooks.
Turkey--Guidebooks.
Princeton subject headings:
Balkan Peninsula--Description and travel--Guidebooks.
Europe--Description and travel--Guidebooks.
Guidebooks.
Istanbul (Turkey)--Buildings, structures, etc.--Guidebooks.
Orient Express (Express train)
Paris (France)--Buildings, structures, etc.--Guidebooks.