@proceedings {, title = {Modelbased Refraction Correction in Intermediate Depth Multibeam Echosounder Survey}, year = {2004}, month = {Jul 5 - Jul 8}, pages = {795-800}, edition = {7th}, address = {Delft, Delft, The Netherlands}, keywords = {Other}, author = {Brian R Calder and Kraft, Barbara J and de Moustier, Christian and Lewis, J and Stein, P} }