@book{1618,
	author = {Wetherill, G. Barrie.},
	title = {Elementary statistical methods /},
	publisher = {Chapman and Hall ,},
	year = {c1972.},
	address = {London :},
	edition = {2nd ed.},
	note = {Distributed in the U.S.A. by Barnes & Noble.},
	url = {http://www.worldcat.org/title/elementary-statistical-methods/oclc/457630&referer=brief_results}
}