@book{158922,
	author = {Symposium on the Use of Isotopes and Radiation in Soil Organic-Matter Studies, and International Atomic Energy Agency.},
	title = {Isotopes and radiation in soil organic-matter studies. /},
	publisher = {International Atomic Energy Agency,},
	year = {1968.},
	series = {Proceedings series.},
	address = {Vienna :}
}