1. Swanson, R. L. & Thurlow, C. I. J. geophys. Res. 78, 2665 (1973).
2. Gagliano, S. M. & van Beck, J. L. Hydrologic and Geologic studies of Coastal Louisiana, Rep. No. 1 (Center for Wetland Resources, Louisiana State University, 1970).
3. Adams, R., Barrett, B. B., Blackmon, J. H., Gane, B. W. & McIntire, W. G. Sea Grant Publ. LSU-T-76-006 (Center for Wetland Resources, Louisiana State University, 1976).
4. Minow, K., Bruland, K. W. & Goldberg, E. D. Geochim. cosmochim. Acta 37, 1171 (1973).
5. Ritchie, J. C., McHenry, A. C. & Gill, A. C. Limnol. Oceanogr. 18, 254 (1973).