Rumauntsch puter-taliaun pledari = Italiano-romanico puter : vocabolario : con grammatica in sintesi e fraseologia Giovanni Pontiggia e Philipp Walther
Bibliothekskatalog der Kantonsbibliothek Graubünden: https://www.opac.gr.ch/discovery/fulldisplay?context=L&vid=41BGR_INST:41BGR_V1&search_scope=MyInstitution&tab=LibraryCatalog&docid=alma990006604150206696