1. Constituents of Tobacco Smoke", Tobacco Manufacturers;BENTLEY, H.R.; BERRY, E.G.N.;Standing Committee Research Paper; Cigarette Smoke Condensate,1959
2. MCCORMICK, A. J. A., and FREEMAN, A. G. (1958). Lancet, 2, 286.
3. RYAN, J. A., and CULSHAW, G. W. (1944). Analyst, 69, 370.
4. SMITH, A. D. M. (1961). Lancet, 1, 1001. WoKEs, F. (1958). Ibid., 2, 526.
5. and PICARD, C. W. (1955). Amer. J. clin. Nutr., 3, 383.