TY  - RPRT
TI  - Pencil lead diameter affects response sheet completion time.
AU  - B H Gordon
AU  - A J Velkey
PY  - 2000
DO  - 10.2466/pms.2000.90.1.326
UR  - https://pubmed.ncbi.nlm.nih.gov/10769918/
ID  - 10769918
ER  -