Di Fiore L. The Invisibles: Political Police and Secret Agents in the Nineteenth-Century Mezzogiorno [Internet]. SHARE Books; 2018 [cited 2026 Oct. 9]. (, editor. FedOAPress - Clio: Essays in History, Archaeology and Art History; vols. 21). Available from: https://www.fedoabooks.unina.it/index.php/fedoapress/catalog/book/81