Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Salvador Martínez, H. and González, Fernán, conde de Castilla, d. 970",Poema de Fernán González,,Espasa Calpe,1991,Colección Austral,,8423919951,,https://cir.nii.ac.jp/crid/1130282271063738240