@book{93533,
	author = {North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development.},
	title = {How to obtain informations in different fields of science and technology; a user' s guide.},
	publisher = {National Technical Information Service, U.S.Department of Commerce},
	year = {1974},
	series = {AGARD Lecture Series no.69},
	address = {Springfield}
}