@book{94766,
	author = {Symposium on Nutrient Mobility in Soils, Detroit, Nov.11,1979.},
	title = {Nutrient mobility in soils, accumulations and losses; proceedings},
	publisher = {Soil Science Society of America},
	year = {1970},
	series = {SSSA Special Publications Series; no.4},
	address = {Madison}
}