Dimensions of individual difference in the spoken syntax of school children.

@article{Hass1974DimensionsOI,
  title={Dimensions of individual difference in the spoken syntax of school children.},
  author={W A Hass and J M Wepman},
  journal={Journal of speech and hearing research},
  year={1974},
  volume={17 3},
  pages={455-69}
}