proofs before lettershttp://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31431349enGetty Institute2026-03-30 20:56:22http://AATesaurus.cultura.gencat.cat/aat/getty_enTesaurus d'Art i Arquitecturatext/html avant la lettre proofs avant-lettre proofs before letters proof before letters proofs, unlettered proofs-before-letters unlettered proofs