Columbia subject headings:
Harvard subject headings:
Asturias (Spain)--Description and travel.
Roads--Spain--Asturias.
Transportation--Spain--Asturias--History.
Travelers--Spain--Asturias--History.
Princeton subject headings:
Asturias (Spain)--Description and travel.
Roads--Spain--Asturias.
Transportation--Spain--Asturias.
Travelers--Spain--Asturias--History.