citation
Stevens, K., Glanville, W. de, Costard, S., Métras, R., Theuri, W., Kruska, R., Randolph, T., Grace, D., Hendrickx, S. and Pfeiffer, D.U. 2009. Risk mapping for HPAI H5N1 in Africa - Improving surveillance for bird flu: Introduction to bird flu risk maps for disease surveillance. Nairobi, Kenya: ILRI.