@proceedings {, title = {Combining Single Frequency Multibeam with Multifrequency Singlebeam Sonars: An Example with Atlantic Herring}, year = {2007}, month = {Jun 25 - Jun 29}, pages = {0-0}, edition = {2nd}, chapter = {International}, address = {Crete, Greece, Greece}, keywords = {Water Column Mapping}, author = {Thomas C Weber and Pena, H} }