TY  - RPRT
TI  - Comparison of operator performance on a tracking task using discretely and continuously variable controls.
AU  - M Hammerton
AU  - A H Tickner
PY  - 1968
DO  - 10.1037/h0026042
UR  - https://pubmed.ncbi.nlm.nih.gov/5665560/
ID  - 5665560
ER  -