Edmond Gatimu, Mwinyikione Mwinyihija and Ken Killham
Research Journal of Environmental Toxicology 1 ( 2 ): 51 - 61 , 2007
Edmond Gatimu, Mwinyikione Mwinyihija and Ken Killham
Research Journal of Environmental Toxicology 1 ( 3 ): 105 - 115 , 2007