7Food and Agriculture Organization of the United Nations (FAO), International Trade Centre (ITC), Technical Centre for Agricultural and Rural Cooperation (CTA) : Worm Markets for Organic Fruit and Vegetables-Opportunities for L~'veloping Countries in the Production and Export of Organic Horticultural Products, 2001.
8Minou Yussefi & Helga Wilier: The Worm of Organic Agriculture 2003-Statistics and Future Prospects, Prepared for International Federation of Organic Agriculture Movements ( IFOAM), 2003.
5Katherine Clancy( ed. ) : In Consumer Demands in the Market Place : Public Policies Related to Food Safety,Quality and Huma Health. Washington,D. C. : Resources for the Future,1986.
6Julie A. Caswell( ed. ) : Economics of Food Safety, Elsevier Science Publishing Co. Inc., 1990.
7John M. Antle: Choice and Efficiency in Food Safety Policy,The AEI Press, Washington,D. C., 1995.
8U. S. Surgeon General: The Surgeon General' s Report on Nutrition and Health, U. S. Department of Health and Human Services, Public Health Service,Washington,D. C. : U. S. Govermmmt Printing Office, 1988.
9Theodore W. Schultz:The Value of the Ability to Deal with Disequilibia,Journal of Economic Literature, 1975.
10Gray S. Becker: The Economic Approach to Human Behavior, Chicago: University of Chicago Press, 1977.
