Munyekho, F., J. Mureithi, and J. Ngeny. “Effects of Rates of Inorganic and Organic Fertilisers on”. East African Agricultural and Forestry Journal, Vol. 69, no. 1&2, Sept. 2008, https://www.kalro.org/www.eaafj.or.ke/index.php/path/article/view/58.