Assessment of core activities and supportive functions for the communicable diseases surveillance system in Khartoum state, Sudan, 2005–2007 Sahal, N. Reintjes, Ralf Eltayeb, E.M. Aro, A.R. 2010 - ReposIt
Communicable diseases surveillance lessons learned from developed and developing countries: Literature review Sahal, N. Reintjes, Ralf Aro, A.R. 2009 - ReposIt