Oyoo, Judith, Edward Mamati, Paul Kinoti, Elijah Ateka, James Karanja, Miriam Judith Otipa, and Lusike Wasilwa. 2017. “Effect of Bio-Stimulators on Growth and Yield of Cowpea Leaves (Vigna Unguiculata Walp) Produced in Juja and Katumani in Kenya”. Journal of Phytology 9 (1):15-23. https://doi.org/10.25081/jp.2017.v9.3379.