Description of sea warning signs on the Black and Azov seas

Description of sea warning signs on the Black and Azov seas / on the hydrographic management of the USSR.- Leningrad: Red.-Ed.DepartureMor.Office, 1924. -XVIII, 119 p.: Tab .. -.I. USSR.Office of the Hydrographic Service of the Navy.1.Territory (collection).Electronic Source: PBOriginal Storage Place: Gunio Mo RF