67083X1 Revised Edition. Running Press, Philadelphia: 1978. 80 pages. Softcover. Good condition. A "breakthrough" book that explores the causes and effects of periodic changes that take place in the human body: Highs and lows which are based on varying hormone levels in the bloodstream. Predictable cycles of minutes, hours, days, weeks, and months are recorded, along with diary materials for the reader to easily plot past and future tendencies for feelings, stamina, and mental ability. Includes an Index. ISBN: 0894710109 $34.99USD
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