1. H. H. Mitchell, “Comparative Nutrition of Man and Domestic Animals,” Vol. 1, Academic Press, New York, 1964, p. 57, 133, 177.
2. R. W. Swift and K. H. Fischer, in “Nutrition- a comprehensive treatise,” Vol. 1, eds. by G. G. Beaton and E. W. MeHenry, Academic Press, New Youk, 1964, p. 181.
3. R. A. Lawrie, in “The Physiology and Biochemistry of Muscle as Food,” Vol. 1, eds. by E. J. Briskey, R. G. Cassens and J. C. Trautman, University of Wisconsin Press, Madison, 1966, p. 137.
4. H. N. Munro, in “Mammalian Protein Metabolism,” Vol. 1, eds. by H. N. Munro and J. B. Allison, Academic Press, New York, 1964, p. 381.
5. A. Asghar, Ph. D. Thesis, University of New England, Armidale, Australia (1969).