@book{1517,
	author = {Penson, John B.},
	title = {Introduction to agricultural economics /},
	publisher = {Pearson/Prentice Hall,},
	year = {c2006.},
	address = {Upper Saddle River, N.J. :},
	edition = {4th ed.},
	note = {Rev. ed. of: Introduction to agricultural economics / John B. Penson, Jr. 3rd ed. c2002.}
}