@book{67404,
	author = {Huffman, Wallace E. and Evenson, Robert E. and ebrary, Inc.},
	title = {Science for agriculture},
	publisher = {Blackwell Pub.,},
	year = {c2006.},
	address = {Ames, Iowa :},
	edition = {2nd ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10300724}
}