L., Dalorima T., Waziri A., Mohammed T., and Kyari Z. 2014. “Evaluation of Different Varieties of Cowpea (Vigna unguiculata.) in Sudan Savanna of Borno State”. The International Journal of Science & Technoledge 2 (9). http://internationaljournalcorner.com/index.php/theijst/article/view/128187.