@book{22563,
	author = {Smaling, E. M. A.},
	title = {Nutrient disequilibria in agroecosystems :},
	publisher = {CABI Pub.,},
	year = {c1999.},
	address = {Wallingford, Oxon, UK ;},
	url = {http://www.loc.gov/catdir/enhancements/fy0606/99014039-d.html}
}