Columbia subject headings:
Mines (Military explosives)
Russia (Federation). Voenno-Morskoĭ Flot.
Soviet Union. Voenno-Morskoĭ Flot.
Warships--Russia (Federation)
Warships--Soviet Union.
Harvard subject headings:
Mines (Military explosives)
Russia (Federation). Voenno-Morskoĭ Flot
Soviet Union. Voenno-Morskoĭ Flot
Warships--Russia (Federation)
Warships--Soviet Union.
Princeton subject headings:
Warships--Russia (Federation)--History--21st century.
Warships--Soviet Union--History--20th century.
Warships--Soviet Union.