John Hertner, from Motion Picture Herald, May 30, 1936.
From The Moving Picture World, October 23, 1915.
From The Moving Picture World, December 4, 1915.
From Richardson's Handbook of Projection, 5th ed, 1927.
From Motion Picture Projectionist, January 1928.
From Exhibitors Herald and Moving Picture World January 21, 1928.
New plant at 12690 Elmwood Avenue, from Motion Picture Projectionist, December 1928.
From Motion Picture Projectionist, June 1931.
From Motion Picture Herald, October 19, 1946.
John Hertner, a bit of background and a look towards the future, from Motion Picture Herald, May 30, 1936.