Mother-infant separation in monkeys.

@article{Seay1962MotherinfantSI,
  title={Mother-infant separation in monkeys.},
  author={B M Seay and E M Hansen and Harry F. Harlow},
  journal={Journal of child psychology and psychiatry, and allied disciplines},
  year={1962},
  volume={3},
  pages={123-32}
}

Topic