Booklet on the Blue Divsion written bt Fernando Ramos, who had volunteered to fight with the Nazis against the USSR. From the series Temas Españoles. no 25 (1953).
El año del Wulfram (1994) by Raúl Guerra Garrido. Novel about the struggle to mine Wulframite (Tungsten) clandistinally in the region of El Bierzo and the attempts by the Nazis and the Allies to buy the mineral. Tungsten was viital for Hitler's war effort in providing tank armour and other uses.