title: A Canadian asbestos counting trial.
mesh_terms: D000395:Air Pollutants, Occupational / Q000032:analysis; D001194:Asbestos / Q000032:analysis*; D002170:Canada; D007753:Laboratories; D008858:Microscopy, Phase-Contrast
chemical_list: D000395:Air Pollutants, Occupational; D001194:Asbestos