TY  - RPRT
TI  - Amount set and the length-difficulty function for a self-paced perceptual-motor skill.
AU  - C E NOBLE
PY  - 1953
DO  - 10.1037/h0061147
UR  - https://pubmed.ncbi.nlm.nih.gov/13118074/
ID  - 13118074
ER  -