Letter: Within-subject variation, measurement error, and selection of a criterion score.

@article{Hetherington1973LetterWV,
  title={Letter: Within-subject variation, measurement error, and selection of a criterion score.},
  author={Ralph Hetherington},
  journal={Research quarterly},
  year={1973},
  volume={44 1},
  pages={
          113-7
        }
}
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