Induced spawning of the two Phytophagous Chinese Carp species Ctenopharyngodon Idella (Val.) and Hypopthalmicthys Molitrix (Val.) with reference to the possible use of the grass carp in the control of aquatic weeds
A rapid centrifuge method for determination and control of sludge concentration in activated sludge plants
Water analysis in South Africa: Interlaboratory comparison studies. Part II: Cod, pH, and electrical conductivity analyses