Columbia subject headings:
Astorga (Spain)--Church history--Sources.
Diplomatics--Spain--Astorga.
Manuscripts, Latin (Medieval and modern)--Spain--Astorga.
Harvard subject headings:
Astorga (Spain)--Church history--Sources.
Catedral de Astorga--History--Sources.
Church history--Middle Ages, 600-1500--Sources.
Princeton subject headings:
Astorga (Spain)--Church history--Sources.
Catedral de Astorga--History--Sources.