found: Ridolini e la collana della suocera e Ridolini esploratore, di Larry Semon, 1945.
found: Biog. index,v. 11 (Semon, Larry, 1889-1928)
found: Boussinot, R. L'encyclopedie du cinema, c1980(Semon, Lary, b. 1889; d. 1928, American actor; known in Italy as Ridolini)
found: Larry Semon, daredevil comedian of the silent screen, 2015:ECIP data view (b. in Mississippi 1889; d. 1928)
found: Wikipedia, 10-09-2015:(Lawrence "Larry" Semon; b. February 9, 1889; d. October 8, 1928; was an American actor, director, producer, and screenwriter during the silent film era; In his day, Semon was considered a major movie comedian, but he is now remembered mainly for working with both Stan Laurel and Oliver Hardy before they started working together; he is also sometimes noted for directing (as well as appearing in) the 1925 silent film Wizard of Oz, which had a slight influence on the better-known 1939 talkie, The Wizard of Oz released by MGM; the compliment was repaid in the 2005 when a three-disc DVD version of the 1939 film, in which the 1925 version appears along with other silent "Oz" movies)