[1] Collier et al., 1971, p. 455, note that certain holograms would be able to store "50 bibles [in] one square inch."

[2] See Leith and Upatnieks, 1964, p. 1301.

[3] See Finlay and Caelli, 1979; Pollen et. al., 1971, 1979; De Valois et al., 1979; and earlier references in Pribram, 1971b.