Romana, M. (2007). Underground works under special conditions: Proceedings of the Workshop (W1), Madrid, Spain, 6-7 July 2007 (Paperback). London: Taylor & Francis.
Dyfyniad Arddull ChicagoRomana, Manuel. Underground Works Under Special Conditions: Proceedings of the Workshop (W1), Madrid, Spain, 6-7 July 2007 (Paperback). London: Taylor & Francis, 2007.
Dyfyniad MLARomana, Manuel. Underground Works Under Special Conditions: Proceedings of the Workshop (W1), Madrid, Spain, 6-7 July 2007 (Paperback). London: Taylor & Francis, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.