@MANUAL {ISHIKAWA:2013a, title = {Cowpea field guide for Burkina Faso}, author = {Ishikawa, H. and Drabo, I. * and Muranaka, S. and Boukar, O. }, year = {2013}, note = {WAHub; CRP Grain Legumes; Cowpea; Cowpea Agronomy; Learning Material; ISBN: 978-978-8444-17-6; 30p.}, }