Invloed van stikstofbemesting, grondtipe en waterstremming op die produksie en watergebruikdoeltreffendheid van Digitaria eriantha cv. Irene onder glashuis toestande
Observations on aspects of the biology Pseudocrenilabrus philander (M. Weber, 1897) from a subtropical South African impoundment
Microbiological survey of open recirculating coolong water systems and their raw water supplies at twelve fossil-fired power stations