References
- 1. Pillsbury, H. C., C. C. Bright, K. J. O'Conner, and F. W. Irish: J. Ass. Offic. Anal. Chem. 52 (1969) 458.
- 2. Ogg, C. L., and E. F. Schultz: J. Ass. Offic. Anal. Chem. 53 (1970) 659.
- 3. Willits, C. 0., M. L. Swain, J. A. Connelly, and B. A. Brice: Anal. Chem. 22 (1950) 430.10.1021/ac60039a013
- 4. Griffith, R. B.: Tobacco Science 1. (1957) 130.10.1097/00132586-195704000-00001
- 5. Harvey, W. R., C. E. Badgett, and F. E. Resnik: Tobacco Science 11 (1967) 84.
- 6. Harvey, W. R., H. M. Stahr, and W. C. Smith: Tobacco Science 13 (1969) 13.
- 7. König, W.: J, Prakt. Chem. N. F. 69 (1904) 105.10.1002/prac.19040690107
- 8. Harvey, W. R., R. W. Hale, and R. M. Ikeda: Tobacco Science 14 (1970) 141.
- 9. Charles, J. L., H. M. Stahr, and R. M. Ikeda: Tobacco Science 13 (1969) 54.