@book{26505,
	author = {Grupen, Claus.},
	title = {Introduction to radiation protection},
	publisher = {Springer,},
	year = {c2010.},
	series = {Graduate texts in physics,},
	address = {Berlin ;},
	url = {http://www.columbia.edu/cgi-bin/cul/resolve?clio8570816}
}