RT Journal Article SR Electronic(1) A1 Ursin, B.YR 1990 T1 Seismic traveltime inversion JF , VO OP SP cp-53-00024 DO https://doi.org/10.3997/2214-4609.201411872 PB European Association of Geoscientists & Engineers, SN 2214-4609, AB , UL https://www.earthdoc.org/content/papers/10.3997/2214-4609.201411872