The ground survey of apes and elephants in Mbam and Djerem National Park using the dung count method. The survey was carried out from January 2008 to August 2009.
Source:Maisels, F., Ambahe, R., Ambassa, E., Yara, C. N., and Fosso, B. (2009). 'Great ape and human impact monitoring in the Mbam et Djerem National Park, Cameroon'. Cameroon: Wildlife Conservation Society, Cameroon Program.