@book{14569,
	author = {Frissel, M. J and International Union of Biological Sciences},
	title = {Simulation of nitrogen behaviour of soil-plant systems :},
	publisher = {Centre for Agricultural Publishing and Documentation,},
	year = {1981},
	address = {Wageningen, Netherlands :},
	note = {Workshop sponsored by IUBS (International Union of Biological Sciences [and others]}
}