TY  - RPRT
TI  - Fibers in human lung dust samples: a scanning electron microscope study.
AU  - K H Friedrichs
AU  - H Otto
PY  - 1981
DO  - 10.1080/15298668191419497
UR  - https://pubmed.ncbi.nlm.nih.gov/7234680/
ID  - 7234680
ER  -