A. Hillers, Kohler, W., Meier, B., Renger, J., Schild, T., and Wolk, C.,
“Managing transboundary waters - new opportunities for Africa”. Deutsche Gesellschaft fur Technische Zusammenarbeit (GTZ), Eschborn, Germany, p. 16 p. : photogr. maps, 2002.
I. Dombrowski, Hillers, A., and Grey, D.,
“The Nile : sharing experiences, sharing visions : International round table 9-12 September 2001”. German Foundation for International Development (DSE), Berlin, Germany, p. individual chapters, ca. 95 p., 2002.