The Communes of Lombardy from the VI. to the X. Century / An Investigation of the Causes Which Led to the Development of Municipal Unity Among the Lombard Communes.

by William Klapp Williams

Paulus Diaconus: De Gestis Langobard. v. Muratori: Script. Rer. Ital., Tom. I.

Savigny: Geschichte des Romischen Rechts im Mittelalter, etc.

Sismondi: Histoire des Républiques Italiennes du Moyen Age. Paris, 1840.

Tacitus: Germania.

Tiraboschi, Girol: Storia della Badia di S. Silvestro di Nonantula, etc. Modena, 1784-1785.

Tomasini, Ludov.: Dei Benefizii.

Tommasio: Historia sanese.

Troya: Delia Condizione dei Romani, etc.

Ughelli: Italia Sacra. 10 vols. fol. Venetiis, 1717-1722.

Collections of documents in the Archivii of many cities of Northern
Italy.