title: United States postage stamp, issued in 1940, honoring Alexander Graham Bell, 1847--1927.
mesh_terms: D001299:Audiometry / Q000266:history; D004582:Electronics, Medical / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D010678:Philately; D013689:Telephone; D014481:United States