I Silgado Herrero, Agustín creator author. Tardón Díaz, Ana author. text bibliography Electronic books. sp 2011 monographic spa 1 online resource (431 pages) : color illustrations. autores: Agustín Silgado Herrero, Ana Tardón Díaz. "10 Bachillerato." Includes bibliographical references. e-sp--- Biology Study and teaching Spain Geology Study and teaching Spain Biology Textbooks Geology Textbooks QH308.2 eBook Silgado Herrero, Agustín. [Madrid] : Ministerio de Educación, Subdirección General de Información y Publicaciones [2009] 9788436949186 8436949188 https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/14761/ https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/14761/ DGITA 140813 DIGMECD0018 eng