@book{8422,
	author = {Liebig, Justus, and Blyth, John,},
	title = {The natural laws of husbandry.},
	publisher = {D. Appleton and company,},
	year = {1863.},
	address = {New York,},
	url = {http://hdl.loc.gov/loc.gdc/scd0001.00026719409}
}