@book{64989,
	author = {Higgins, A. Pearce },
	title = {Defensively - Armed Merchant Ships and Submarine Warfare / },
	publisher = {Stevens and Sons, Limited, },
	year = {1917.},
	address = {London : },
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B11-08643.pdf}
}