1. F. H. Bowman. “The Structure of the Cotton Fibre,” 1908, p. 249.
2. THE PHOSPHORUS CONTENT OF COTTON
3. J. T. Marsh and F. C. Wood. “An Introduction to the Chemistry of Cellulose,” 1938, p. 11; and Thorpe “Dictionary of Applied Chemistry,” 4th Ed., Vol. V, p. 142.
4. N. Allport. “Colorimetric Analysis,” Second Impression, 1947, p. 157.