title: Stamp vignette on medical science. Percy Lavon Julian--industrial chemist.
authors.affiliation: Mayo Clinic, Rochester, MN 55905, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Kyle
authors.forename: M A
authors.initials: MA
authors.lastname: Shampo
mesh_terms: D002617:Chemical Industry / Q000266:history; D049673:History, 20th Century; D010678:Philately; D014481:United States