@book{8313,
	author = {Hawkes,Peter W.},
	title = {Principles of Electron Optics:},
	publisher = {Elsevier Science & Technology Books},
	year = {July 1994},
	address = {San Diego : },
	edition = {3rd ed.},
	url = {http://www.columbia.edu/cgi-bin/cul/resolve?clio10818448}
}