Columbia Graphophone Company (English Wikipedia)

Sutton, Allan (12 June 2019). "The Birth of Electrical Recording – Part 1". Mainspring Press. Archived from the original on 29 May 2020. Retrieved 23 February 2020.

bbc.co.uk

Burns 2000, p. 98. Burns, R. W. (2000). The Life and Times of A. D. Blumlein. London: Institute of Electrical Engineers, in association with the Science Museum. ISBN 9780852967737.
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Burns 2000, pp. 112–3. Burns, R. W. (2000). The Life and Times of A. D. Blumlein. London: Institute of Electrical Engineers, in association with the Science Museum. ISBN 9780852967737.
Billboard - Google Books. 11 May 1968. Retrieved 12 February 2013.
Southall, Brian (2011). The Rise & Fall of EMI Records - Brian Southall - Google Books. ISBN 9780857120298. Retrieved 28 February 2013.
Nguyen, Tu Thanh (January 2010). Competition Law, Technology Transfer and the Trips Agreement: Implications ... - Tú Thanh Nguyen - Google Books. ISBN 9781849805445. Retrieved 12 February 2013.
Billboard - Google Books. 11 November 1967. Retrieved 28 February 2013.
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"Louis Saul Sterling". Grace's Guide to British Industrial History. 7 October 2014. Retrieved 8 June 2019.

Walworth, Julia (2005). "Sir Louis Sterling and his library". Jewish Historical Studies. 40. Jewish Historical Society of England: 161. JSTOR 24027031.

""Heart Full of Soul" record label". i1127.photobucket.com. Retrieved 12 February 2012.

"Sterling, Louis (1879–1958)". Sound Of The Hound. (originally printed in Gramophone Magazine, July 1958). 18 June 2011. Retrieved 8 June 2019.

"Helen_Shapiro_Overseas_Albums_Japan". aearwaker.tripod.com. Retrieved 25 March 2016.

"Columbia Corporate History: Introduction". Discography of American Historical Recordings. Retrieved 2022-08-04.
Brooks, Tim (ed.), Columbia Corporate History: The Early 1920s, Columbia Master Book Discography, Volume I (Online ed.), Discography of American Historical Recordings, archived from the original on Feb 5, 2024; "Notes to Columbia Records, 1901-1934: A History". Discography of American Historical Recordings. Archived from the original on May 31, 2023.
Brooks, Tim (ed.), Columbia Corporate History: Electrical Recording and the Late 1920s, Columbia Master Book Discography, Volume I (Online ed.), Discography of American Historical Recordings (DAHR) See also Notes section.
Brooks, Tim (ed.), Columbia Corporate History: Market Crash, 1929, and the Early 1930s, Columbia Master Book Discography, Volume I (Online ed.), Discography of American Historical Recordings (DAHR) See also Notes section.

Brooks, Tim (ed.), Columbia Corporate History: The Early 1920s, Columbia Master Book Discography, Volume I (Online ed.), Discography of American Historical Recordings, archived from the original on Feb 5, 2024; "Notes to Columbia Records, 1901-1934: A History". Discography of American Historical Recordings. Archived from the original on May 31, 2023.
Sutton, Allan (12 June 2019). "The Birth of Electrical Recording – Part 1". Mainspring Press. Archived from the original on 29 May 2020. Retrieved 23 February 2020.