TY  - RPRT
TI  - Airways obstruction, coal mining, and disability.
AU  - N L Lapp
AU  - W K Morgan
AU  - G Zaldivar
PY  - 1994
DO  - 10.1136/oem.51.4.234
UR  - https://pubmed.ncbi.nlm.nih.gov/8199664/
ID  - 8199664
ER  -