Columbia subject headings:
Harvard subject headings:
Alfonso III, King of Asturias and Leon, approximately 848-approximately 910--Congresses.
Asturias (Spain)--History--Congresses.
Leon (Kingdom)--History--Alfonso III, 866-910--Congresses.
San Salvador de Valdediós (Church)--History--Congresses.
Spain--History--711-1516--Congresses.
Princeton subject headings:
Alfonso III, King of Asturias and Leon, approximately 848-approximately 910--Congresses.
Asturias (Spain)--History--Congresses.
San Salvador de Valdedión (Church)--Congresses.
Spain--History--711-1516--Congresses.