Researches on the clastic fills of fissures in the exokarst of the southern flank of the Sierra of Alona-Aizkorri, Basque Country

1. Gonzalez, J.A.
2. Isturitz, M.J.
3. Lopez De Azcona, G.
4. Sanchez Goni, M.F.
5. Ugarte, F.M.