B. Anton y Stamm, C.,
«African local governments : towards e-learning for sustainability». Local Governments for Sustainability, International Training Centre (ICLEI), Freiburg, Germany, p. 96 p. : 1 fig., 4 tab., 2004.
Y. Adeyemi,
African water development report. Addis Ababa, Ethiopia: United Nations Economic Commission for Africa (ECA), 2004, p. xxiii, 300 p. : 25 boxes, 61 fig., 82 tab.