Langat B.K.; SuloT.K; Nyangweso P.M.; Ngéno, V.K.; Korir M.K.; Kipsat M.J.(Association of Agricultural Economists (AAAE) and 48 th Agricultural Economists Association of South Africa, 2010-09)
Chessum, Emmanuel Kipkorir; Akivaga, Erick Mugatsia; Otieno, Fred A. O.; Kibiiy, Joel; Shitote, Stanley(International Journal of the Physical Sciences, 2010)