The ground survey of elephants in the huge logging concession East of the Odzala Kokoua National Park (Ngombe Forest Management Unit and Ntokou-Pikounda forest) using the dung count method. The survey was conducted during late 2007.
Source:Malonga, R. (2008). 'Final report on elephant and great apes survey in the Ngombe FMU and Ntokou-Pikounda forest Republic of Congo'. Congo: Wildlife Conservation Society.