References

1. Miner, R.J.; Humenik, F.J.; Overcash, M.R. Managing Livestock Wastes to Preserve Environmental Quality; Iowa State University Press: Ames, IA, 2000.

2. National Research Council. Air Emissions from Animal Feeding Operations: Current Knowledge and Future Needs; The National Academies Press: Washington, DC, 2003.

3. United States Environmental Protection Agency. Clean Water Act; 2002. www.epa.gov.

4. Battye, R.; Battye, W.; Overcash, C.; Fudge, S. Develop ment and Selection of Ammonia Emission Factors; EC/R, Inc.: Durham, NC, 1994.

5. Williams, M.C. Development of Environmentally Superior Technologies: Year Three Progress Report for Technology Determinations per Agreements Between the Attorney General of North Carolina and Smithfield Foods, Premium Standard Farms, and Frontline Farmers; Raleigh, NC, 2003. www.cals,ncsu.edu/waste mgt/.

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