1. Multibeam sonar mapping and modeling of a submerged Bryophyte mat in Crater Lake, Oregon Author/Creator: Dartnell, Peter Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2008 Resource Type: Map Edition: Version 1.0, August 28, 2008. Access & Availability: Loading