Association among wild orang-utans: sociality, passive aggregations or chance?

@article{Mitani1991AssociationAW,
  title={Association among wild orang-utans: sociality, passive aggregations or chance?},
  author={John C. Mitani and Gregory F. Grether and Peter S. Rodman and Dolly Priatna},
  journal={Animal Behaviour},
  year={1991},
  volume={42},
  pages={33-46}
}

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