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Human Biorhythms
Biorhythm is a periodic change in a person's state from some minimum to a maximum value. The main influence on a person is rendered by three biorhythms: a physical one with a length of 23 days, an emotional one with a periodicity of 28 days and an intellectual one with a duration of 33 days.
1087 pages, Kindle Edition
Published February 16, 2018
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