The economic effects of the mineral content present in the Vaal River Barrage on the community of the PWV complex
Letter to the Editor with regard to the paper: Changes in Morphology and Phosphate-Uptake Patterns Of Acinetobacter Calcoàceticus Strains
Induced spawning of the common carp and Aischgrund Carp (Cyprinus Carpio) and the Largemouth Yellowfish (Barbus Kimberleyensis)
Some observations on biological and other control measures of the African clawed frog Xenopus Laevis (Daudin) (Pipidae, Amphibia) in fish ponds in Transkei
Besproeing, gewasopbrengs en dreinering op die Vaalhartsbesproeiingskema: 1. die bydrae van plaaswaterverbruik, besproeiingsbestuur en kanaalwaterverliese tot versuiping
Absorption by Chlorella Vulgaris Beijer. of phosphorus compounds released by the submerged Macrophyte Potamogeton Pectinatus l
Elimination of toxic metals from wastewater by an integrated wastewater treatment/water reclamation system