Asbestos verus nonasbestos fibers. Ultramicroscopic criteria.
D001194:Asbestos; D004391:Dust; D004781:Environmental Exposure; D004782:Environmental Health; D008722:Methods; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D014505:Urban Population
D004391:Dust; D001194:Asbestos