Computation of 3D curvatures on a wet snow sample J. B. Brzoska, B. Lesaffre, C. Coléou, K. Xu and R. A. Pieritz Eur. Phys. J. AP, 7 1 (1999) 45-57 Published online: 15 July 1999 DOI: 10.1051/epjap:1999198