@book{24698,
	author = {Sokal, Robert R. and Sneath, Peater H. A.},
	title = {Principles of numerical taxonomy /},
	publisher = {W.H. Freeman,},
	year = { c1963.},
	series = {A series of books in biology.},
	address = { San Francisco : },
	note = {Includes indexes.}
}