@Book{RANME20161112077, title = "Radiactividad y geof\'{\i}sica", author = "LOPEZ DE AZCONA, Juan Manuel", publisher = "Madrid : [s.n.]", editor = "[s.n.]", series = "(Bolet\'{\i}n del Instituto Geol\'{o}gico y Minero de Espa\~{n}a ; 63)", URL = "http://bibliotecavirtual.ranm.es/ranm/es/consulta/registro.do?id=13207", year = "1951", }