[1. Johnson, W. H.: 5th International Tobacco Scientific Congress, Hamburg 1970. ]Search in Google Scholar
[2. Bradford, J. A., Harlan, W. R., Hammer, H. R.: Ind. Eng. Chem. 28 (1936) 836. 10.1021/ie50319a020]Search in Google Scholar
[3. Bulletin d'Information du CORESTA, 1969-1 . ]Search in Google Scholar
[4. Bulletin d'Information du CORESTA, 1969-2. ]Search in Google Scholar
[5. Williamson, J.: Private communication.]Search in Google Scholar
[6. Carlson, C.: Unpublished results.]Search in Google Scholar
[7. Dalhamn, T.: Arch. Environmental Health, in press.]Search in Google Scholar
[8. Bartle, K. D., Bergstedt, L., Novotny, M., and Widmark, G.:· J; Chromatography 45 (1.969) 256. 10.1016/S0021-9673(01)86208-7]Search in Google Scholar
[9. Novotny, M.: Chromatographia 2 (1.969) 350.]Search in Google Scholar
[10. Bergstedt, L., and Widmark, G.: Chromatographia 2 (1.969) 529.10.1007/BF02260095]Search in Google Scholar
[11.. Vollmin, J. A., Omura, 1., Seibl, L Grob, K., and Simon, W.: Helv. Chim. Acta 49 (1.965) 1.768.]Search in Google Scholar
[12. Grob, K.: Beitr. Tabakforsch. :3 (1.966) 403.]Search in Google Scholar
[13. Cornu, A., and Massot, R.: Compilation of mass spectral data, Heyden & Son, London 1.966, and First Supplement, London 1.967.]Search in Google Scholar
[14. Stenhagen, E., Abrahamsson, S., and McLafferty, S. W.: Atlas of mass spectral data, John Wiley and Sons, New York 1.969.]Search in Google Scholar
[15. Sydow, E. von, Anjou, K., and Karlsson, G.: Swedish Institute for Food Preservation Research, Report No. 279, Goteborg 1.970.]Search in Google Scholar
[16. Enzelt C., Appleton, A., and Wahlberg, I.: In Wailer, G. R. (Ed.), Biochemical applications of mass spectrometry, John Wiley and Sons, in press, and references quoted here.]Search in Google Scholar
[17. Elmenhorst, H., and Schultz, Ch.: Beitr. Tabakforsch. 4 (1.968) 90.]Search in Google Scholar
[18. Grob, K., and Vollmin, J. A.: Beitr. Tabakforsch. 5 (1.969) 52. ]Search in Google Scholar
