By A Mystery Man Writer
Northeast Document Conservation Center
1898: Poulsen records voice on magnetic wire, The Storage Engine
Home Page - Museum of Magnetic Sound Recording
Museum of Magnetic Sound Recording - interview with Martin Theophilus
AMPEX Model 200/200A Tape Machine
Phantom Productions reel to reel tape recorder 1908 ad collection
Martin Theophilus of The Museum of Magnetic Sound Recording, Part Two – PS Audio
Pavek Museum Collections
Fundamentals of AV Preservation - Chapter 1 — NEDCC