Agbo, EA, FU Ugese, and PK Baiyeri. 2015. “Vegetative Propagation of African Walnut (<i>Plukenetia conophora</I>) Using Pre-Treated Stem Cuttings of Varied Physiological Ages”. Agro-Science 13 (1):37-43. https://doi.org/10.4314/as.v13i1.6.