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2. Soil and hydrology: their effect on NOM;Aiken;J. - Am. Water Works Assoc.,1995
3. An introduction to humic substances in soil, sediment, and water;Aiken,1985
4. Bacterial utilization of different size classes of dissolved organic matter;Amon;Limnol. Oceanogr.,1996
5. The surface chemistry of humic substances in aquatic systems;Beckett,1990