Pollnagran
External References
Geological Survey Ireland | 1727NWK016 |
Select Bibliography
Drew, D.P. & Hickey, C. (2004) Caves of County Roscommon. Proceedings of the University of Bristol Spelaeologoical Society. 23. 1. 35-50.
Irish Caves Database
Geological Survey Ireland | 1727NWK016 |