@book{93959,
	author = {Symposium on the use of isotopes and radiation in soil organic matter studies, Vienna, Jul.15-19, 1968.},
	title = {Isotopes and radiation in soil organic-matter studies},
	publisher = {International Atomic Energy Agency},
	year = {1968},
	series = {International Atomic Energy Agency; Proceeding Series},
	address = {Vienna}
}