@book{67798,
	author = {Mann, W. B. and Ayres, R. L.},
	title = {Radioactivity and its measurement /},
	publisher = {Pergamon Press,},
	year = {1980.},
	series = {Pergamon international library of science, technology, engineering, and social studies},
	address = {Oxford :},
	edition = {2nd ed., rev. and expanded.}
}