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2. Evaluation of ultrafiltration for determining molecular weight of fulvic acid;Aiken;Environ. Sci. Technol.,1984
3. Isolation and concentration techniques for aquatic humic substances;Aiken,1985
4. A critical evaluation of the use of macroporous resins for the isolation of aquatic humic substances;Aiken,1988
5. Determination of molecular weights of humic substances by colligative property measurements;Aiken,1989