@book{95956,
	author = {Soil testing and plant analysis; part 1.},
	title = {Soil testing},
	publisher = {SSSA},
	year = {1967},
	series = {Soil Science Society of America Special Publication Series; no.2, Joint symposia held at Kansas, Nov.15-19, 1964 and at Columbus, Oct.31-Nov.5,1964.},
	address = {Madison}
}