1. C. B. Purves, in “Cellulose and Cellulose Derivatives, Pt. I,” eds. E. Ott, H. M. Spurlin, and M. W. Gra/ine, Wiley, New York, 1954, p. 29.
2. Physics and Chemistry of Cellulose Fibers;Hermans,1949
3. Principles of Polymer Chemistr;Flory,1953
4. Researches on Cellulose (III), Longmans;Cross,1912
5. The Chemistry of Cellulose;Heuser,1944