References
- 1. Toet, L., and Mary J. Toet: Method for one step DOT extraction and cleanup in tobacco for monitoring purposes; Beitr. Tabakforsch. 7 (1973) 93.
- 2. Coresta Recommended Method No. 2: Determination of organochlorine pesticide residues in tobacco; Coresta Information Bulletin 1974-2, p. 27, and-Beitr. Tabakforsch."S (1975) 209.