Footnote
a Biological clocks, or circadian rhythms, are not to be confused with what are commonly called biorhythms. For a discussion of biorhythms, please see Awake! of April 22, 1979, pages 16-19.
a Biological clocks, or circadian rhythms, are not to be confused with what are commonly called biorhythms. For a discussion of biorhythms, please see Awake! of April 22, 1979, pages 16-19.