1935: Audio recorder uses low-cost magnetic tape

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1935: Audio recorder uses low-cost magnetic tape, The Storage Engine

The Blattnerphone

Semi Joseph Begun. Magnetic Recording: The Ups and Downs of a Pioneer: The Memoirs of Semi Joseph Begun. Edited by, Mark Clark. viii + 159 pp., illus., apps. New York: Audio Engineering

Equipment Museum

Beverley Gooch and the Evolution of Magnetic Tape

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1001 Hi-Fi Info: 80 years of tape recording - The Magnetophon

Magnetic Tape - an overview

AES E-Library » Magnetic Sound Recording in Europe up to 1945