TY  - RPRT
TI  - Extended workdays in an underground mine: a work performance analysis.
AU  - J C Duchon
AU  - C M Keran
AU  - T J Smith
PY  - 1994
DO  - 10.1177/001872089403600207
UR  - https://pubmed.ncbi.nlm.nih.gov/8070791/
ID  - 8070791
ER  -