@book{95959,
	author = {Symposium on Soil Testing, Knoxville, Tennessce, Aug., 1975.},
	title = {Soil testing; correlating and interpreting the analytical results, proceedings},
	publisher = {American Society of Agronomy},
	year = {1977},
	series = {American Society of Agronomy, Special Publication; no.29},
	address = {Wisconsin}
}