1. Agrawal, M., 2003. Enhancing Food Chain Integrity: Quality Assurance Mechanism for Air Pollution Impacts on Food and Vegetable System. Final Technical Report (R7530) Submitted to Department for International Development, United Kingdom.
2. Chemical analysis;Allen,1986
3. Prevention of Food Adulteration Act No. 37 of 1954. Central and State Rules as Amended for 1999;Awashthi,2000
4. Contaminants, Joint FAO/WHO Food Standards Program;Codex Alimentarius Commission,1984
5. Transfer of metals from soil to vegetables in an area near a smelter in Nanning, China;Cui;Environment International,2004