https://openlibrary.org/books/OL20680637M.opdsOrtografia e origem da lingua portuguesa2009-12-15T07:04:13ZDuarte Nunes de Leaohttps://openlibrary.org/authors/OL6105570A/Duarte_Nunes_de_LeaoImprensa Nacional-Casa de Moeda(s.l.)1983porhttps://openlibrary.org/books/OL20680637M