References
- Kaufman , E. L. , Reese , T. W. , Volkmann , J. and Rogers , S. 1947 . Accuracy, variability, and speed of adjusting an indicator to a required bearing , Psychophysical Research Unit, Mount Holyoke College . Memorandum Report No. 166-I-MHC 4
- Rogers , S. , Volkmann , J. , Reese , T. W. and Kaufman , E. L. 1947 . Accuracy and variability of direct estimates of bearing from large display screens , Psychophysical Research Unit, Mount Holyoke College . Memorandum Report No. 166-I-MHC 1