@book{92171,
	author = {United States.},
	title = {Electrical instruments and telephones of the U.S. Signal corps.},
	publisher = {Govt. print. off.,},
	year = {1911.},
	series = {Its  Manual},
	address = {Washington,},
	edition = {Revised 1910.},
	note = {"War department. Document no. 378. Office of the Chief signal officer of the army."}
}