Columbia subject headings:
Highfield, J. R. L. (John Roger Loxdale)
Spain--Church history.
Spain--History--711-1516.
Harvard subject headings:
Church history--Middle Ages, 600-1500
Highfield, J. R. L. (John Roger Loxdale)
Highfield, J. R. L. (John Roger Loxdale)--Bibliography.
Spain--Church history.
Spain--History--711-1516.
Princeton subject headings: