1. Trougus, C., Ber., 64, 405 (1931); et al., 408.
2. Harland, W. G., J. Textile Inst., 45, T, 678 (1954).
3. Bennett, C. F., and Timell, T. E., Svensk Papperstidn., 58, 281 (1955).
4. Wise, L. E., and Jahn, E. C., Wood Chemistry (Reinhold Pub. Corp., New York, 1952).
5. Davidson, G. F., J. Text. Inst., 32, T, 109 (1941).