Barnard, J.G. Notes on sea-coast defence: consisting of sea-coast fortification, the fifteen-inch gun, and casemate embrasures / By J. G. Barnard; J.G. Barnard .— : Van Nostrand, 1861 .— 113 с. — Lang: eng .— URL: https://rucont.ru/efd/83570 (дата обращения: 31.05.2024)