TY  - BOOK
AU  - Keller,John Esten
TI  - Gonzalo de Berceo
U1  - 861.1 
PY  - 1972///
CY  - New York
PB  - Twayne Publishers
KW  - Berceo, Gonzalo de,
KW  - Civilization, Medieval, in literature
N1  - Includes bibliographical references and index
ER  -