Stads, Gert-Jan; Bani, Grégoire; Magne Domgho, Lea Vicky, 'République du Congo: Fiche d’information sur les indicateurs de la R&D agricole 2014', International Food Policy Research Institute (IFPRI); General Delegation of Scientific and Technical Research, Washington, D.C., 2014
International Food Policy Research Institute (IFPRI), '2015 Nutrition country profile: Iran', International Food Policy Research Institute (IFPRI), Washington, DC, 2015
Tanner, J.C., Harris, P., Lekasi, J. and Kimani, S. 2000. Manure management in the Kenya Highlands: Collection strategies to enhance fertiliser quality and quantity. Final Technical Report for project R6731. Coventry: The Henry Doubleday Research Association, UK, 121 pp