Mary Breckinridge and the frontier nursing service.
Matthies
K
K
D000047:Academies and Institutes / Q000266:history*; D005582:Foundations / Q000266:history*; D049711:History, Modern 1601-; D009729:Nursing; D009774:Obstetrics / Q000266:history*; D012952:Societies / Q000266:history*; D014481:United States