Leakey, R.E. & Lewin, R. (1978) People of the Lake, New York : Doubleday, p.52.
2.
Morgan, E. (1972) The Descent of Woman, New York : Stein & Day.
3.
— — — (1979) More on Man's Aquatic Evolution. New Humanist, 95, 27-29.
4.
Scholander, P.F. (1963) The Master Switch of Life, Scientific American, 209: 92-106.
5.
Alexander, F. (1950) Psychosomatic Medicine, New York: Norton, pp.132, 60.
6.
Freedman, A.M.; Kaplan, H.I. & Sadock, B.J. (1972) Modern Synopsis of the Comprehensive Textbook of Psychiatry, Baltimore: Williams & Wilkins, pp.330, 447.
