The key of Santillana del Mar and Altamira - García Gunea, Miguel Angel (Madrid : Sílex, 1991)
Translation of: La Llave de Santillana del Mar y Altamira.
Includes bibliographical references (p. 169-170).
Keywords: Santillana del Mar (Spain) -- GuideBooks; Altamira Cave (Spain) -- GuideBooks; Electronic books