Multi-scale hydrological variability in N Iberia during the Mid to Late Holocene from speleothem Mg/Ca - Cruz, Juncal A.; Turrero, María Jesús; Marín-Roldán, Alicia; Ortega Martínez, Ana Isabel; Edwards, Richard Lawrence; Rodríguez-Fonseca, Belén; Muñoz-García, María Belén; Martín Chivelet, Javier (2016)