“Effect of Method of Weed Control and Insecticide (Lambda-Cyhalothrin) Rates on the Productivity of Cowpea (Vigna Unguiculata (L) Walp) in a Southern Guinea Savanna of Nigeria”. Tropical Agriculture, vol. 95, no. 3, Oct. 2018, https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/5383.