1. Organic Geochemistry of Natural Waters;Thurman,1985
2. Humic Substances in Soil, Sediment, and Water: Geochemistry, Isolation, and Characterization;Malcolm,1985
3. Humic Substances in Soil and Crop Sciences;Malcolm,1990
4. Isotope Tracers in Catchment Hydrology;Wang,1998
5. Organic Carbon-14 in the Amazon River System