A synthesis of local agro-ecological knowledge on drivers of tree cover change in the Blue Nile Basin: Opportunities and constraints to integrating trees in Diga, Fogera and Jeldu Woredas in Ethiopia - Cronin, M.; Lamond, G.; Balaguer, F.; Venturinib, F.; Sidaa, T.; Pagellab, T.; Sinclair, Fergus L. (World Agroforestry Centre, 2013)