@Book{BMDB20180019968, title = "La secci\'{o}n magn\'{e}tica", author = "Merveille, E", publisher = "Barcelona : Gustavo Gili", editor = "Gustavo Gili", URL = "https://bibliotecavirtual.defensa.gob.es/BVMDefensa/es/consulta/registro.do?id=45171", year = "1908", }