1. ADMIRAAL, W., 1984. The ecology of estuarine sediment inhabiting diatoms. Progress in Phycological Research, 3: 269–322.
2. ALVE, E., 1991. Foraminifera climatic change, and pollution: a study of late Holocene sediments in Drammensfjord, southeast Norway. The Holocene, 1: 243–261.
3. ANDERSON, N.J., 1989. A whole-basin diatom accumulation rate for a small eutrophic lake in Northern Ireland and its palaeoecological implications. J. Ecol., 77: 926–946.
4. ANDERSON, N.J., B. RIPPEY, and C.E. GIBSON, 1992. A comparison of geochemical phosphorus and diatom-inferred phosphorus and its implications for lake restoration. Hydrobiologia (in press).
5. ANONYMOUS, 1987. Quality status report of the North Sea: a report by the scientific and technical working group, Dept. of the Environment. H.M.S.O., London, 88 pp.