1. A revised scheme for the comparison of quantitative methods;Barnett, R.N.; Youden, W.J.;Amer. J. clin. Path,1970
2. Evaluation of commercial kits;Logan, J.E.;Crit. Rev. clin. Lab. Sci., Chemical Rubber,1972
3. Serum tri-iodothyronine determination in clinical use;Stafford, J.E.H.; Lees, S.; Watson, D.;J. clin. Path,1976
4. News Sheet No;Watson, D.,1974
5. Accuracy and standardisation of serum thyroxine assays;Watson, D.; Lees, S.; Stafford, J.E.H.;Ann. clin. Biochem; World Health Organisation; Expert Committee on Biological Standardisation, Twenty-Sixth Report,1974