found: The New York hat [MP] 1912(name not given)
found: The birth of a nation [VR] 198-?:opening credits (photography, G.W. Bitzer)
found: Variety obits(Bitzer, G. W. "Billy" a.k.a. William G. "Billy"; d. 1944)
found: LC data base, 5/18/93(hdg.: Bitzer, G. W., 1872-1944; usage: G.W. Bitzer)
found: Internet movie database, Aug. 17, 2002:(G.W. Bitzer; b. Johann Gottlob Wilhelm Bitzer, April 21, 1872, Roxbury, Mass.; d. Apr. 29, 1944, Hollywood, Calif.; sometimes credited as Billy Bitzer, Georg William 'Billy' Bitzer, Georg William Bitzer; cinematographer, 1890s-1930s)
found: Halliwell's filmgoers' comp., 1988(Billy Bitzer; AKA George William Bitzer)
found: IMDb, October 16, 2020:(G.W. Bitzer; cinematographer, director, camera and electrical department)
