The late Quaternary in the Western Pyrenean Region : Proceedings of the international Conference on the environment and the human society in the Western Pyrenees and the Basque Mountains during the upper Pleistocene and the Holocene, Gasteiz-Vitoria, May 3-5, 1990 - Cearreta, Alejandro; Ugarte, Félix M., 1945-1991 (Universidad del País Vasco, 1992)