Historical Documents
How Recordings are Made in the Victor Laboratory
How Your Records Were Manufactured
Victor Record Sales (1901-1941) (from Mainspring Press)
The Victor Book of the Opera (1912) (from Google Books)
History of the Victor Talking Machine Company
Memoir of My Career at Victor Talking Machine Company, 1898-1925, by Harry O. Sooy
Memoirs of My Recording and Traveling Experiences for the Victor Talking Machine Company, 1898-1925, by Raymond Sooy