TY  - RPRT
TI  - Sampling and evaluating respirable coal mine dust.
AU  - M Jacobson
PY  - 1972
DO  - 10.1111/j.1749-6632.1972.tb40226.x
UR  - https://pubmed.ncbi.nlm.nih.gov/4350435/
ID  - 4350435
ER  -