https://data.decalog.net/enap1/Liens/fonds/F6G16.PDF?]]>
https://babel.hathitrust.org/cgi/pt?id=wu.89094622479&seq=7]]> https://catalog.hathitrust.org/Record/100026842]]> https://gallica.bnf.fr/ark:/12148/bpt6k4807129q.r=la%20graphologie?rk=107296;4]]> https://opac-stg.iccu.sbn.it/risultati-ricerca-avanzata/-/opac-adv/index/5/ITICCUSBL0160503?item%3A13%3ACodiceClassificazioneDewey%3A%3A%40frase%40=137.7]]>