Columbia subject headings:
Ruiz, Juan, approximately 1283-approximately 1350--Political and social views.
Ruiz, Juan, approximately 1283-approximately 1350. Libro de buen amor.
Harvard subject headings:
Economics in literature.
Politics in literature.
Ruiz, Juan, active 1343. Libro de buen amor.
Ruiz, Juan, approximately 1283-approximately 1350--Political and social views.
Ruiz, Juan, approximately 1283-approximately 1350. Libro de buen amor.
Social problems in literature.
Princeton subject headings: