title: Howard Taylor Ricketts--imaginative investigator.
mesh_terms: D049671:History, 18th Century; D049673:History, 20th Century; D006801:Humans; D008800:Mexico; D009009:Montana; D012373:Rocky Mountain Spotted Fever / Q000266:history*; D014438:Typhus, Epidemic Louse-Borne / Q000266:history*