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2. Incidence, variability and controlling factors for trace elements in natural fresh waters;Andelman,1974
3. Interaction between humic acid fraction of soil and trace element cations;Basu;J. Indian Soc. Soil Sci.,1964
4. Organic and inorganic geochemistry of some Coastal Plain rivers of the southeastern United States;Beck;Geochim. Cosmochim. Acta,1974
5. Determination of lead and cadmium associated with naturally occurring organics extracted from surface waters, using flameless atomic absorption;Briese;At. Absorpt. Newsl.,1975