[1. Haenni, E. 0., Howard, J. W., and Joe, F. L.: Dirnethyl sulfoxide: a superior analytical extraction solvent for polynuclear hydrocarbons and for some highly chlorinated hydrocarbons. J. Assoc. Offic. Agr. Chemists 45 (1962) 67-'JO.]Search in Google Scholar
[2. Carugno, N., and Waltz, P.: Determination des hydrocarbures polycycliques par chromatographie en phase gazeuse. Proc. 3rd World Tobacco Sei. Congr., Salisbury, Rhodesia, 1963, pages 573-583 (1964).]Search in Google Scholar
[3. Fordyce, W. B., Hughes, I. W., and lvinson, M. G.: The Eiltration of tobacco smoke. Tobacco Sei. 5 (1961) 7o-75.]Search in Google Scholar
[4. Spotswood, T. M.: The chromatography of polycyclic aromatic hydrocarbons on partially acetylated cellulose: Part 2. J. Chromatog. 3 (1960) 101-110.]Search in Google Scholar
[5. Ferrand, R.: Possibilites d'application de la chromatographie en phase gazeuse a l'etude des brais de goudrons de houille. Chim. Anal. (Paris) 45 (1963) 133-134.]Search in Google Scholar
[6. Ayres, C. 1., Horsewell, H. G., and Hughes, I. W. (in preparation). ]Search in Google Scholar
