Sources in nursing historical research: a thorny methodological problem.
Mansell
D
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D002170:Canada; D004282:Documentation / Q000266:history; D006663:Historiography; D006676:History of Nursing; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D015399:Nursing Research / Q000266:history / Q000379:methods*