found: Lawson, J. The stones of Venice, 1992:p. 15 (Carlo Ponti; photographer, 1850's-1860's)
found: George Eastman House-Humanities Research Center union catalog [of photographers], June 1996(Ponti, Carlo; b. Sagno, Switzerland, ca. 1823; d. Venice, Italy, Nov. 16, 1893)
found: Carlo Ponti, 1997:p. 9, etc. (b. zwischen 1822 und 1824 in Sagno im Tessin; d. Nov. 16, 1869 in Venice; inventor of alethoscope; photographer)
found: Souvenir photographique de Venise, 186-?:t.p. (Charles Ponti, opticien et photographe de S.M. le roi d'Italie)
