@book{12731,
	author = {Barkley, Andrew, and Barkley, Paul W.},
	title = {Principles of agricultural economics},
	publisher = {Routledge,},
	year = {c2013.},
	address = {New York :},
	note = {Includes index.},
	url = {http://www.tandfebooks.com/isbn/9780203371145}
}