Quadruplets times two.

@article{Segal2001QuadrupletsTT,
  title={Quadruplets times two.},
  author={Nancy L. Segal},
  journal={Twin research : the official journal of the International Society for Twin Studies},
  year={2001},
  volume={4 1},
  pages={60-1}
}
  • Nancy L. Segal
  • Published 2001 in
    Twin research : the official journal of the…