1. BERG, R.R. 1993. Hydrology of the Berg River estuary. Unpub. report to the Dept. of Water Affairs and Forestry, 14 pp.
2. BRIGGS, J.C. 1974. Marine zoogeography. McGraw-Hill, New York, 475 pp.
3. DAY, J.H. 1981, Summaries of current knowledge of 43 estuaries in southern Africa. In: Estuarine ecology with particular reference to southern Africa, (cd.) J.H. Day, pp. 251–329. A.A. Balkema, Rotterdam.
4. DAY. J.H. BLABER, S.J.M. & WALLACE. J.H. 1981. Estuarine fishes. In: Estuarine ecology with particular reference to southern Africa, (ed.) J.H. Day, pp. 197–222. A.A. Balkema, Rotterdam.
5. GAUCH, H.G. 1982. Multivariate analyses in community ecology. Cambridge University Press, Cambridge.