References
- Anonymous, 1985: Indicative Programme Water 1985–1989. — Dutch Ministry of Transport and Water Management and Dutch Ministry of Housing, Physical Planning and Environment, The Hague, The Netherlands, (in Dutch).
- Anonymous, 1988: Ecological standard objectives for dutch surface waters. — CUWVO (Dutch Commission for Enforcement of the Water Pollution Act), The Hague, The Netherlands, (in Dutch).
- Anonymous, 1989: Scenario for the development of methods for ecological assessment of dutch inland waters. — STORA (Dutch Foundation for Applied Waste Water Research), The Hague, The Netherlands, in press, (in Dutch).
- Braak, C. J. F. Ter, 1987: CANOCO — a FORTRAN program for canonical community ordination by (partial) (detrended) (canonical) correspondence analysis and redundancy analysis. — TNO Inst. Applied Computer Science, Wageningen, The Netherlands, 95 pp.
- Gauch, H. G., 1982: Multivariate Analysis in Community Ecology. — Cambridge University Press, Cambridge, U.K., 298 pp.
- Tolkamp, H. H. & Gardeniers, J. J. P., 1988: The development of biological water quality assessment in the Netherlands. — Hydrobiol. Bull. 22 (1): 87–91.