title: Dr Ludwig L Zamenhof & Esperanto, an international language.
authors.forename: M
authors.initials: M
authors.lastname: Kay
mesh_terms: D049672:History, 19th Century; D049673:History, 20th Century; D007391:International Cooperation / Q000266:history; D007802:Language; D009717:Numismatics / Q000266:history*; D011044:Poland