1. Agency for Toxic Substances and Disease Registry, 2005. Draft Toxicological Profile for Arsenic. United States Department of Health and Human Services.
2. American Society of Agricultural Engineers, 2005. Manure Production and Characteristics. American Society of Agricultural Engineers, St. Joseph. ASAE D384.2.
3. Arsenic speciation and reactivity in poultry litter;Arai;Environ. Sci. Technol.,2003
4. Association for the Environmental Health of Soils, 1998. Study of State Soil Arsenic Regulations. Amherst, MA. Association for the Environmental Health of Soils.
5. BCF, 2006. Hou-Act Brochure [online]. Available from http://www.bcfproducts.com/Hou-Act-Brochure.pdf [Accessed May 3, 2007].