Fadl, K.E.M., Mahmoud, S.E. and Hamad, Z.M. 2015. Farmers’ perceptions towards agroforestry systems in North and South Kordofanstates, Sudan. International Journal of Environment. 4, 2 (Jun. 2015), 53–67. DOI:https://doi.org/10.3126/ije.v4i2.12624.