@book {6741,
	title = {Pearls: a natural history},
	year = {2001},
	publisher = {Harry N. Abrams, Inc.},
	organization = {Harry N. Abrams, Inc.},
	address = {New York},
	author = {Landman, N. H. and Mikkelsen, P. M. and Bieler, R. and Bronson, B.}
}
@book {1332,
	title = {Pearls: a natural history},
	year = {2001},
	publisher = {Harry N. Abrams, Inc.},
	organization = {Harry N. Abrams, Inc.},
	address = {NewYork},
	author = {Landman, N. H. and Mikkelsen, P. M. and Bieler, R. and Bronson, B.}
}
