The problem of sampling on built heritage: a preliminary study of a new non-invasive method

1. Prieto-Taboada, N.
2. Isca, C.
3. Martínez-Arkarazo, I.
4. Casoli, A.
5. Olazabal, M.A.
6. Arana, G.
7. Madariaga, J.M.