@Misc{BMDB20200316442, title = "Originalkarte des Centralen Theiles des Thianschan - Gebirgssystems", publisher = "Gotha : Justus Perthes", editor = "Justus Perthes", URL = "https://bibliotecavirtual.defensa.gob.es/BVMDefensa/es/consulta/registro.do?id=100624", year = "1875", }