@book{56413,
	author = {Campbell, K. O. and Longworth, J. W., coaut.},
	title = {Economia agrícola :},
	publisher = {AEDOS, },
	year = {1970},
	address = {Barcelona, España :},
	edition = {1a ed.},
	note = {Traducción de : Fundamentals of modern agricultura}
}