%0 Journal Article %J Pan Africa News %D 2013 %T Well digging by Semliki chimpanzees: New data on laterality andpossible significance of hydrology %A McGrew, WC %A Marchant, LF %A Payne, CLR %A Webster, TH %A Hunt, KD %B Pan Africa News %V 20 %P 5-8 %G eng