1. Contamination-free sample collection and handling protocols for trace elements in natural fresh waters;Ahlers;Australian Journal of Marine & Freshwater Research,1990
2. Evaluation of ultrafiltration for determining molecular weight of fulvic acid;Aiken;Environmental Science and Technology,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