@book{92147,
	author = {Hutchinson, H. D. and MacDonnell, A. C.},
	title = {Field fortification;},
	publisher = {Gale & Polden, ltd.},
	year = {[1910]},
	series = {Gale & Polden's military series},
	address = {London,},
	edition = {6th ed.,}
}