@book{166290,
	author = {Grace, Neville},
	title = {Managing trace element deficiencies the diagnosis and prevention of selenium, cobalt, copper and iodine deficiencies in New Zealand Grazing Livestock  /},
	publisher = {AgResearch,},
	year = {1994},
	address = {New Zelanda  :},
	note = {Fotocopía}
}