TY - JOUR A1 - Timko, J.A. A1 - Waeber, P.O. A1 - Kozak, R.A. T1 - The socio-economic contribution of non-timber forest products to rural livelihoods in Sub-Saharan Africa: Knowledge gaps and new directions Y1 - 2010 DO - 10.1505/ifor.12.3.284 JF - International Forestry Review VL - 12 IS - 3 SP - 284 EP - -294 ER -