@article{Hamburg1968,
  author    = {Hamburg, D. A.},
  title     = {Emotions in the perspective of human evolution},
  journal   = {S. L. Washburn and P. C. Jay, Perspectives on human evolution, New York, et al. (Holt, Rinehart and Winston) 1968, pp. 246-257.},
  year      = {1968},
  language  = {en}
}