@Misc{BMDB20180147821, title = "Planisph\`{e}re Terrestre suivant la projection de Mercator : lignes Isodynamiques", publisher = "Paris : Gide", editor = "Gide", URL = "https://bibliotecavirtual.defensa.gob.es/BVMDefensa/es/consulta/registro.do?id=58572", year = "1867", }