Achoka, J. S. K1., Stephen O. Odebero2, Julius K. Maiyo3 and Ndiku J. Mualuko4
1Masinde Muliro University of Science and Technology, P. O. BOX 190 – 50100 Kakamega, Kenya
2Egerton University, P. O. Box 536, Egerton
3Masinde Muliro University of Science and Technology, P. O. BOX 190 – 50100 Kakamega, Kenya
4Masinde Muliro University of Science and Technology, P. O. Box 190 – 50100 Kakamega, Kenya
