Further observations on the induced spawning of the Sharptooth Catfish, Clarias Gariepinus (Clariidae: Pisces)
The spatial distribution in Southern Africa of rainfall erosivity for use in the universal soil loss equation
Preliminary studies on the treatment of canning factory effluent with an integrated bacterial-algal-fish system
Metal surveys in South Africa estuaries IIi Hartenbos, Little Brak and Great Brak rivers (Mossel Bay)