References

The information used in the web page was obtained from
the following sources.
http://www.nsfoods.com/organic_weed.html
http://www.nature.com/nsu/020527/020527-12.html
http://www.nature.com/nsu/000831/000831-4.html
http://greennature.com/article1336.html
http://news.bbc.co.uk/1/hi/sci/tech/588589.stm
http://www.organic-research.com/research/Papers/theme4.asp
http://www.organic-growers.com/Organic_Presentation.htm
http://www.rain.org/~sals/my.html