The use of control charts in the clinical laboratory. 1950.
Levey
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Jennings
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D002624:Chemistry, Clinical / Q000266:history* / Q000592:standards; D049673:History, 20th Century; D007753:Laboratories / Q000266:history* / Q000592:standards; D010336:Pathology / Q000266:history; D011786:Quality Control; D012015:Reference Standards