TY - BOOK TI - The evaluation of dual beam echo sounders in hydrographic surveying UR - https://www.biodiversitylibrary.org/item/125428 PB - Naval Postgraduate School CY - Monterey, California PY - 1979 N1 - ADA078273. --- Thesis (M.S. in Ocean. (Hydrography))--Naval Postgraduate School, 1979. AU - Seidel, Dean Robert. AU - Naval Postgraduate School (U.S.) KW - Oceanography ER -