title: History, benefits and limitations of Pyrex glass particle opacity references.
mesh_terms: D001886:Bordetella pertussis / Q000166:cytology / Q000276:immunology; D002452:Cell Count; D005898:Glass / Q000592:standards*; D007391:International Cooperation; D008027:Light; D009391:Nephelometry and Turbidimetry; D010567:Pertussis Vaccine / Q000592:standards*; D014481:United States
chemical_list: D010567:Pertussis Vaccine