Columbia subject headings:
Ruiz, Juan, approximately 1283-approximately 1350. Libro de buen amor--Concordances.
Harvard subject headings:
Ruiz, Juan, active 1343. Libro de buen amor--Concordances.
Ruiz, Juan, approximately 1283-approximately 1350. Libro de buen amor--Concordances.
Princeton subject headings:
Ruiz, Juan, approximately 1283-approximately 1350. Libro de buen amor--Concordances.