1. EPA National Primary Drinking Water Regulations [Sec. 141.32(e) (20)], Federal Regulations,1992
2. Humic Substances in Soil, Sediment, and Water;Aiken,1985
3. Geochemistry of Marine Humic Compounds;Rashid,1985
4. Analytical constraints on the structural features of humic substances
5. Humic Substances in Soil, Sediment, and Water;Aiken,1985