@book{1938,
	author = {Mackean, D. G.},
	title = {Introduction to Biology/},
	publisher = {Hodder Murray,},
	year = {1973.},
	address = {[S.l.] :},
	edition = {5th ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0719528313/chopaconline-20}
}