1. Humic Substances in Soil, Sediment, and Water Geochemistry, Isolation, and Characterization;Aiken,1985
2. Humic Substances II: Search of Structure,1989
3. Humic Substances II: Search of Structure;Lawson,1989
4. Humic Substances in the Environment;Schnitzer,1972
5. Humic Substances and their Role in the Environment;Horth,1988