Texto a dos col.
CCPBM - https://www.cultura.gob.es/cultura/areas/bibliotecas/mc/ccpb/que-es-ccpb.html
Comprehensive Johnson's dictionary. An enlarged edition of Johnsons dictionary of the english language : containin many hundred words not to be met with in recent pocket editions.
Libros
Real Academia de Ciencias Morales y Políticas, Madrid