@BOOKLET {IITA:2016, title = {Standard operating protocol for yam variety performance evaluation trial}, author = {IITA, }, editor = {Asfaw, A. }, year = {2016}, address = {International Institute of Tropical Agriculture (IITA)}, howpublished = {Booklet}, note = {ISBN: 978-978-8444-68-8; 27p.; RTB; Yam}, }