References
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- IWTO Technical Committee. Specification for Test Methods IWTO-8-61 (E).
- Anderson , S. L. and Warburton. , F. L. 1949 . J. Text. Inst. , 40 : T749
- R. C. Palmer. Proc. IWTO Tech. Cttee, 1947, Report No. 1.
- N. F. Roberts. Proc. IWTO Tech. Cttee, 1959, June, Report No. 9.
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