1. Survey of fish-farm effluents in some EIFAC countries,1982
2. The environmental impact of aquaculture,1983
3. Nutrient accumulation in Sphagnum mosses II. Intra- and inter-specific variation in four species from ombrotrophic and minerotrophic habitats;Aulio;Ann. Bot. Fennici,1982
4. The influence of nutrient supply on the morphology of Sphagnum cuspidatum;Baker,1988
5. A Beginner's Guide to Freshwater Algae;Belcher,1976