title: A pair of paradoxical stamps from Ecuador.
authors.forename: J T
authors.initials: JT
authors.lastname: Tierney
mesh_terms: D004484:Ecuador; D049673:History, 20th Century; D009369:Neoplasms / Q000266:history; D010678:Philately / Q000266:history*; D010947:Plants, Toxic; D014026:Nicotiana