El-Ashry, M.T.
Natural resource management and agricultural productivity in Sub-Saharan Africa - Roma (Italia) 1992 - 15 p. - Staft Working Paper - Series on Technical Issues in Rural Poverty Alleviation (FIDA) no. 2 .
Natural resource management and agricultural productivity in Sub-Saharan Africa - Roma (Italia) 1992 - 15 p. - Staft Working Paper - Series on Technical Issues in Rural Poverty Alleviation (FIDA) no. 2 .