title: Thoreau's natural pollinometers.
authors.affiliation: University of Colorado, School of Medicine.
authors.forename: H N
authors.initials: HN
authors.lastname: Claman
mesh_terms: D005197:Famous Persons; D049672:History, 19th Century; D006801:Humans; D008297:Male; D011058:Pollen; D006255:Rhinitis, Allergic, Seasonal / Q000266:history*; D014481:United States