title: Sources in nursing historical research: a thorny methodological problem.
authors.forename: D
authors.initials: D
authors.lastname: Mansell
mesh_terms: 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*