1. State of California, California Administrative Code, Title 3, Chapter 4, Subchapter 1, Group 2, Article 23, Section 2477 (no date).
2. Kaloyanova, F. Toxicity of selected groups of pesticides. Toxicity of pesticides: proceedings of a seminar, Sofia, Bulgaria 31 August-12 September 1981 European Cooperation on Environmental Health Aspects of the Control of Chemicals—Interim Document 9. Edited by: Kaloyanova, F and Tarkowski, S. pp.288Copenhagen: World Health Organization.