@book{24445,
	author = {Frome, Edward Charles, and Warren, Charles,},
	title = {Outline of the method of conducting a trigonometrical survey, for the formation of geographical and topographical maps and plans;},
	publisher = {Lockwood and co.,},
	year = {1873.},
	address = {London,},
	edition = {4th ed. rev. and enl.}
}