Chartae Latinae Antiquiores. Facsimile-edition of the Latin Charters, 2nd Series, Ninth Century, edited by G. Cavallo, G. Nicolaj, published by C. Gattagrisi, C. Drago Tedeschini, Part LXXXVII, Italy LIX, Lucca XVI [Premessa + docc. nn. 1-22]