Modelling the influence of terraced landforms to the Earth’s gravity fieldMärdla, Silja; Oja, Tõnis; Ellmann, Artu; Jürgenson, HarliGravity, Geoid and Height Systems : proceedings of the IAG Symposium GGHS2012, October 9-12, 2012, Venice, Italy2014 / p. 157-162 : ill Modelling the influence of terraced landforms to the Earth’s gravity fieldTalvik, Silja; Oja, Tõnis; Ellmann, Artu; Jürgenson, HarliInternational Symposium on Gravity, Geoid and Height Systems GGHS2012 : Venice, October 9-12, 20122013