A note on PCBs and chlorinated hydrocarbon pesticide residues in water, fish and sediment from the Olifants River, Eastern Transvaal, South Africa
Preliminary observations on the effect of increased concentrations of total dissolved salts on growth and photosynthetic rates in different algal species
Human health aspects of the metals zinc and copper in tissue of the African sharptooth catfisf, Clarias gariepinus, kept in treated sewage effluent and in the Krugersdrift Dam
Die invloed van N-peil, grondtipe en waterstremming op die produksie en watergebruiksdoeltreffendeheid van Panicum maximum cv. Gatton