@Misc{BMDB20150224460, title = "Estaci\'{o}n magn\'{e}tica", author = "La Cour, Dan Barford, 1876-1942", publisher = "Copenhague : Anderson \& Sorensen", editor = "Anderson \& Sorensen", URL = "https://bibliotecavirtual.defensa.gob.es/BVMDefensa/es/consulta/registro.do?id=31065", year = " ", }