Humic substances in soils, peats and waters health and environmental aspects ; [invitations for contributions were based on presentations from the International Conference on Humic Substances in Soils, Peats and Water: Implications for Plant Growth, Industry and Sustainable Environment held in Dublin on 18 and 19 September 1995 and the Meeting on the Role of Organic Matter in Sustainable Agriculture held in Silsoe on 14 and 15 April 1994] - Hayes, Michael H. B. (Royal Soc. of Chemistry, 1997)