RT Book, Section SR 00 A1 Yousif, H.M. T1 Rural population settlements and the environment in central Sudan YR 1995 FD 1995 A2 Clarke, J.I. A2 Tabah, L. T2 Population-Environment-Development Interactions PB CICRED PP Paris AV Published LK https://pure.iiasa.ac.at/id/eprint/4348/