@article {310990, title = {A Field Study in Siam of the Behavior and Social Relations of the Gibbon (Hylobates Lar).}, journal = {Comparative Psychology Monographs}, volume = {16}, year = {1940}, pages = {1-212}, doi = {http://dx.doi.org/10.2307/1374943}, author = {Carpenter, C. R.} }