@book{24591,
	author = {Kral, David M,},
	title = {Organic Farming: Current Technology and Its Role in a Sustainable Agriculture /},
	publisher = {Soil Science Society of America,},
	year = {1984.},
	series = {SSSA Special Publications Number 46},
	address = {Madison, Wisconsin :},
	note = {Incluye Bibliografía.}
}