@book{13619,
	author = {W.C. Burnett. and International Geological Correlation Programme.},
	title = {Phosphate deposits of the world :},
	publisher = {Cambridge University Press,},
	year = {c1990.},
	address = {Cambridge ;},
	note = {includes index},
	url = {http://www.loc.gov/catdir/description/cam031/84021396.html}
}