title: The purchase of health care by selected American households in 1917-1919: a machine-readable source.
authors.forename: J D
authors.initials: JD
authors.lastname: Howell
mesh_terms: D006077:Government Agencies / Q000266:history; D005102:Health Expenditures / Q000266:history*; D006306:Health Surveys; D049673:History, 20th Century; D006801:Humans; D007255:Information Services; D014481:United States