@book{30125,
	author = {Smith, R. A.},
	title = {Radio aids to navigation.},
	publisher = {University Press,},
	year = {1947.},
	series = {Modern radio technique},
	address = {Cambridge [Eng.]},
	note = {"The material for this book was prepared in the first instance as a contribution to the Ministry of Supply (Air) Scientific war records."}
}