@base . . a ; . a , , ; , , ; "National geographic." ; ; ; ; "2604-6156" ; ; ; "2604-6156" ; ; "2604-6156" ; "National geographic." , "National geographic (Ed. en español. Internet)" ; ; "https://www.nationalgeographic.es/" . a ; ; "20210206212400.0"^^ ; ; . a ; "2604-6156" ; . a . "Spain" . a ; "1138-1434" ; . a , ; "National geographic (Ed. en español. Internet)" .