@book{70971,
	author = {Ordinance Survey Office and Ordinance Survey Office},
	title = {Field Archaeology /},
	publisher = {Her Majestry's Stationary Office,},
	year = {1963.},
	series = {Ordinance Survey Professionals series},
	address = {London :},
	edition = {4th ed.},
	note = {Reprint of the 2d (1953) ed. published by Methuen, London.},
	url = {No.13}
}