Die gebruik van hidrochemiese tegnieke in grondwatereksplorasie in die Venterstadomgewing, Kaapprovinsie
Treatment of effluents from ammonia plants – part I: biological nitrification of an inorganic effluent from a nitrogen-chemicals complex
Treatment of effluents from ammonia plants – part ii: biological oxidation of carbon-one compounds in an effluent from an ammonia plant