1. J. Chamber1ain . “Hosiery Yarns and Fabrics”, Vol. II. City of Leicester College of Technology, 1949, 107.
2. P. J. Doyle.Text. Inst.1953, 44, P561.
3. F. T. Peirce.Text. Res. J.1947, 17, 123.
4. H. M. Fletcher and S. H. Roberts.ibid.1952, 22, 84.
5. Idem. ibid.1952, 22, 466.