Columbia subject headings:
Layamon, active 1200. Brut.
Wace, approximately 1100-approximately 1175. Roman de Brut.
Harvard subject headings:
Layamon, active 1200.
Wace, approximately 1100-approximately 1175. Roman de Brut.
Princeton subject headings:
Layamon, active 1200. Brut.
Wace, approximately 1100-approximately 1175. Roman de Brut.