1. J. A. Rajchman, Appl. Optics, 9, (1970), 2269. See also Applied Optics, 13, (1974), 755–924, for a collection of many of the papers presented at the Topical Meeting of the OSA on Optical Storage of Digital Data., These include references to considerable prior work.
2. A. Geffon, paper #6–7, 1977 Digests of the Intermag Conference (1977).
3. The Sony Betamax has 400 tracks/cm and about 1.6 x 104 flux reversals/cm of analog recording.
4. Koichi Kugimiya, et al., paper,#26–8,_1977 Digests of the Intermag Conference, (1977).
5. M. Satou, et al., paper #22–8, 1977 Digests of the Intermag Conference, (1977).