@book{23128,
	author = {Zim, Herbert S.},
	title = {Codes & secret writing /},
	publisher = {Scholastic Book Services,},
	year = {c1948, 1975 printing.},
	address = {New York :},
	edition = {Abridged ed.},
	url = {http://www.archive.org/details/codessecretwriti00zimh}
}