TY  - RPRT
TI  - Occupational risks associated with cigarette smoking: a prospective study.
AU  - J Ryan
AU  - C Zwerling
AU  - E J Orav
PY  - 1992
DO  - 10.2105/ajph.82.1.29
UR  - https://pubmed.ncbi.nlm.nih.gov/1536330/
ID  - 1536330
ER  -