RT Journal Article SR Electronic(1) A1 MacBeth, C.YR 1991 T1 Inversion of VSP field data for anisotropy with singularities JF , VO OP SP cp-42-00272 DO https://doi.org/10.3997/2214-4609.201411014 PB European Association of Geoscientists & Engineers, SN 2214-4609, AB , UL https://www.earthdoc.org/content/papers/10.3997/2214-4609.201411014