Clays from selected localities.
||Forti, P., Menichetti, M., and Rossi, A. (1989) Speleothems and speleogenesis of the Faggeto Tondo Cave (Umbria, Italy). Proceedings of the 10th International Congress of Speleology, Budapest, 1, 74-76.|
|Galdenzi, S., and Menichetti, M. (1995) Occurrence of hypogenic caves in a karst region: Examples from central Italy. Environmental Geology, 26, 39-47.|