Columbia subject headings:
Ruiz, Juan, approximately 1283-approximately 1350. Libro de buen amor.
Harvard subject headings:
Authors, Spanish--14th century--Criticism and interpretation.
Ruiz, Juan, active 1343. Libro de buen amor.
Ruiz, Juan, approximately 1283-approximately 1350. Libro de buen amor
Princeton subject headings:
Ruiz, Juan, approximately 1283-approximately 1350. Libro de buen amor.