@incollection{iiasa4348,
       booktitle = {Population-Environment-Development Interactions},
          editor = {J.I. Clarke and L. Tabah},
           title = {Rural population settlements and the environment in central Sudan},
         address = {Paris},
       publisher = {CICRED},
            year = {1995},
             url = {https://pure.iiasa.ac.at/id/eprint/4348/},
          author = {Yousif, H. M.}
}