International Hydrographic Organization., Intergovernmental Oceanographic Commission., & Canadian Hydrographic Service. (1978). General bathymetric chart of the oceans (GEBCO) (5th ed.). Ottawa, Canada: Canadian Hydrographic Service : Hydrographic Chart Distribution Office.
சிகாகோ பாணியிலான மேறà¯à®•à¯‹à®³à¯à®•à®³à¯International Hydrographic Organization., Intergovernmental Oceanographic Commission, and Canadian Hydrographic Service. General Bathymetric Chart of the Oceans (GEBCO). 5th ed. Ottawa, Canada: Canadian Hydrographic Service : Hydrographic Chart Distribution Office, 1978.
எமà¯à®Žà®²à¯à®Ž மேறà¯à®•à¯‹à®³à¯ காடà¯à®Ÿà®¿International Hydrographic Organization., Intergovernmental Oceanographic Commission, and Canadian Hydrographic Service. General Bathymetric Chart of the Oceans (GEBCO). 5th ed. Ottawa, Canada: Canadian Hydrographic Service : Hydrographic Chart Distribution Office, 1978.