1. Anon., 1985. The Analysis of Agricultural Materials – A Manual of the Analytical Methods used by the Agricultural Development and Advisory Service (ADAS), MAFF, Ref. Book 427, HMSO, London, England.
2. Anon., 1993. Composting Association of the United States. EPA Guideline, 40 CFR Part 3. Composting Council Fact Sheet, Alexandria, Virginia, USA.
3. Anon., 2000. The Composting Association Standards for Composts Working Document, UK.
4. Anon., 2001. Northern Ireland Public Health Laboratory (NIPHL) Food and Environmental Sample Analytical Procedures Manual. NIPHL, Belfast City Hospital, Belfast, UK.
5. Anon., 2002. Council of the European Communities (CEC) Regulation (EC) No. 1774/2002. Animal by-products not intended for human consumption. Official Journal (OJ) C 223, 281.