@book{23940,
	author = {Biological Sciences Curriculum Study. and Welch, Claude A.},
	title = {Biological science:},
	publisher = {Houghton Mifflin, },
	year = {[1973]},
	series = {Houghton Mifflin science program},
	address = {Boston : },
	edition = {Blue version. 3d ed.}
}